4-bromo-2-prop-2-ynoxybenzaldehyde

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (0.852 g, 3.56 mmol) and formylmethylenetriphenylphosphorane (2.2 g, 7.12 mmol, 2 equiv) suspended in THF (20 mL) under nitrogen was stirred at ambient temperature for 18 h and then at 50° C. for another 24 h. The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL). The filtrate was concentrated under reduced pressure and the residue was purified by silica gel chromatography using a linear gradient of EtOAc:hexane (1:19 to 1:9). Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure to give (E)-3-(4-bromo-2-(prop-2-ynyloxy)phenyl)acrylaldehyde (0.69 g, 2.6 mmol, 57% yield). 1H NMR (500 MHz, CDCl3) δ 9.71 (d, J=7.6 Hz, 1H), 7.77 (d, J=16.2 Hz, 1H), 7.45 (d, J=8.2 Hz, 1H), 7.26-7.17 (m, 2H), 6.77 (dd, J=16.2, 7.6 Hz, 1H), 4.82 (d, J=2.4 Hz, 1H), 4.80-4.75 (m, 1H), 2.62 (t, J=2.4 Hz, 1H). The Z-isomer showed the aldehydic proton at δ 9.87 (d, J=7.9 Hz) and a smaller cis-coupling (J=11.4 Hz) for the olefinic proton at δ 6.22; LCMS (Method B) (ESI) m/e 265.0, 267.0 Br pattern [(M+H)+, calcd for C12H9BrO2 265.0]. at 50° C. for another 24 h The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL) The filtrate was concentrated under reduced pressure the residue was purified by silica gel chromatography Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (0.852 g, 3.56 mmol) and formylmethylenetriphenylphosphorane (2.2 g, 7.12 mmol, 2 equiv) suspended in THF (20 mL) under nitrogen was stirred at ambient temperature for 18 h and then at 50° C. for another 24 h. The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL). The filtrate was concentrated under reduced pressure and the residue was purified by silica gel chromatography using a linear gradient of EtOAc:hexane (1:19 to 1:9). Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure to give (E)-3-(4-bromo-2-(prop-2-ynyloxy)phenyl)acrylaldehyde (0.69 g, 2.6 mmol, 57% yield). 1H NMR (500 MHz, CDCl3) δ 9.71 (d, J=7.6 Hz, 1H), 7.77 (d, J=16.2 Hz, 1H), 7.45 (d, J=8.2 Hz, 1H), 7.26-7.17 (m, 2H), 6.77 (dd, J=16.2, 7.6 Hz, 1H), 4.82 (d, J=2.4 Hz, 1H), 4.80-4.75 (m, 1H), 2.62 (t, J=2.4 Hz, 1H). The Z-isomer showed the aldehydic proton at δ 9.87 (d, J=7.9 Hz) and a smaller cis-coupling (J=11.4 Hz) for the olefinic proton at δ 6.22; LCMS (Method B) (ESI) m/e 265.0, 267.0 Br pattern [(M+H)+, calcd for C12H9BrO2 265.0]. at 50° C. for another 24 h The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL) The filtrate was concentrated under reduced pressure the residue was purified by silica gel chromatography Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Conversion of 4-bromo-2-hydroxybenzaldehyde to its sodium salt was carried out as follows: A solution of 4-bromo-2-hydroxybenzaldehyde (3.0 g, 24.9 mmol) in MeOH (˜150 mL) was treated with 1N aq. NaOH (15.7 mL, 1.05 equiv). The resulting pale yellow solution was concentrated under reduced pressure. EtOH (30 mL) was added to the residue and the solution was concentrated under reduced pressure. This was repeated with EtOH (30 mL) and then with heptane (50 mL). The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) with stirring and to it was added propargyl bromide in toluene (80 wt %, 2.33 mL, 1.4 equiv). The reaction mixture was stirred at ambient temperature for 22 h, after which time the volatiles were concentrated under reduced pressure. The residue was partitioned between EtOAc (70 mL) and water (40 mL). The organic layer was separated and treated with charcoal (˜1 g) then dried (Na2SO4) and filtered. The filtrate was concentrated under reduced pressure. The residue obtained was crystallized from EtOAc and hexane (3:7). Crop I afforded 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (893 mg) as colorless needles. The mother liquor was concentrated under reduced pressure and crystallized again from EtOAc and hexane (7:93) to obtain a further Crop II of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (1.902 g). The mother liquor was concentrated again and subjected to one more crystallization as described before. Crop III yielded additional 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (344 mg). All the three crops were combined to give a total of 3.14 g (87% yield) of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde as colorless needles. 1H NMR (500 MHz, CDCl3) δ 10.43 (s, 1H), 7.74 (d, J=8.2 Hz, 1H), 7.31 (d, J=1.5 Hz, 1H), 7.24-7.28 (m, 1H), 4.85 (d, J=2.4 Hz, 2H), 2.64 (t, J=2.4 Hz, 1H); LCMS (Method A) (ESI) m/e 239.0, 241.0 Br pattern [(M+H)+, calcd for C10H7BrO2 239.0]; SiO2 TLC (EtOAc:Hexane=1:9) indicated Rf of 0.32 compared with an Rf of 0.43 for starting material aldehyde. The resulting pale yellow solution was concentrated under reduced pressure EtOH (30 mL) was added to the residue the solution was concentrated under reduced pressure The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) The reaction mixture was stirred at ambient temperature for 22 h after which time the volatiles were concentrated under reduced pressure The residue was partitioned between EtOAc (70 mL) and water (40 mL) The organic layer was separated treated with charcoal (˜1 g) then dried (Na2SO4) filtered The filtrate was concentrated under reduced pressure The residue obtained was crystallized from EtOAc and hexane (3:7)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (0.852 g, 3.56 mmol) and formylmethylenetriphenylphosphorane (2.2 g, 7.12 mmol, 2 equiv) suspended in THF (20 mL) under nitrogen was stirred at ambient temperature for 18 h and then at 50° C. for another 24 h. The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL). The filtrate was concentrated under reduced pressure and the residue was purified by silica gel chromatography using a linear gradient of EtOAc:hexane (1:19 to 1:9). Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure to give (E)-3-(4-bromo-2-(prop-2-ynyloxy)phenyl)acrylaldehyde (0.69 g, 2.6 mmol, 57% yield). 1H NMR (500 MHz, CDCl3) δ 9.71 (d, J=7.6 Hz, 1H), 7.77 (d, J=16.2 Hz, 1H), 7.45 (d, J=8.2 Hz, 1H), 7.26-7.17 (m, 2H), 6.77 (dd, J=16.2, 7.6 Hz, 1H), 4.82 (d, J=2.4 Hz, 1H), 4.80-4.75 (m, 1H), 2.62 (t, J=2.4 Hz, 1H). The Z-isomer showed the aldehydic proton at δ 9.87 (d, J=7.9 Hz) and a smaller cis-coupling (J=11.4 Hz) for the olefinic proton at δ 6.22; LCMS (Method B) (ESI) m/e 265.0, 267.0 Br pattern [(M+H)+, calcd for C12H9BrO2 265.0]. at 50° C. for another 24 h The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL) The filtrate was concentrated under reduced pressure the residue was purified by silica gel chromatography Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (0.852 g, 3.56 mmol) and formylmethylenetriphenylphosphorane (2.2 g, 7.12 mmol, 2 equiv) suspended in THF (20 mL) under nitrogen was stirred at ambient temperature for 18 h and then at 50° C. for another 24 h. The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL). The filtrate was concentrated under reduced pressure and the residue was purified by silica gel chromatography using a linear gradient of EtOAc:hexane (1:19 to 1:9). Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure to give (E)-3-(4-bromo-2-(prop-2-ynyloxy)phenyl)acrylaldehyde (0.69 g, 2.6 mmol, 57% yield). 1H NMR (500 MHz, CDCl3) δ 9.71 (d, J=7.6 Hz, 1H), 7.77 (d, J=16.2 Hz, 1H), 7.45 (d, J=8.2 Hz, 1H), 7.26-7.17 (m, 2H), 6.77 (dd, J=16.2, 7.6 Hz, 1H), 4.82 (d, J=2.4 Hz, 1H), 4.80-4.75 (m, 1H), 2.62 (t, J=2.4 Hz, 1H). The Z-isomer showed the aldehydic proton at δ 9.87 (d, J=7.9 Hz) and a smaller cis-coupling (J=11.4 Hz) for the olefinic proton at δ 6.22; LCMS (Method B) (ESI) m/e 265.0, 267.0 Br pattern [(M+H)+, calcd for C12H9BrO2 265.0]. at 50° C. for another 24 h The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL) The filtrate was concentrated under reduced pressure the residue was purified by silica gel chromatography Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Conversion of 4-bromo-2-hydroxybenzaldehyde to its sodium salt was carried out as follows: A solution of 4-bromo-2-hydroxybenzaldehyde (3.0 g, 24.9 mmol) in MeOH (−150 mL) was treated with 1N aq. NaOH (15.7 mL, 1.05 equiv). The resulting pale yellow solution was concentrated under reduced pressure. EtOH (30 mL) was added to the residue and the solution was concentrated under reduced pressure. This was repeated with EtOH (30 mL) and then with heptane (50 mL). The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) with stirring and to it was added propargyl bromide in toluene (80 wt %, 2.33 mL, 1.4 equiv). The reaction mixture was stirred at ambient temperature for 22 h, after which time the volatiles were concentrated under reduced pressure. The residue was partitioned between EtOAc (70 mL) and water (40 mL). The organic layer was separated and treated with charcoal (˜1 g) then dried (Na2SO4) and filtered. The filtrate was concentrated under reduced pressure. The residue obtained was crystallized from EtOAc and hexane (3:7). Crop I afforded 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (893 mg) as colorless needles. The mother liquor was concentrated under reduced pressure and crystallized again from EtOAc and hexane (7:93) to obtain a further Crop II of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (1.902 g). The mother liquor was concentrated again and subjected to one more crystallization as described before. Crop III yielded additional 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (344 mg). All the three crops were combined to give a total of 3.14 g (87% yield) of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde as colorless needles. 1H NMR (500 MHz, CDCl3) δ 10.43 (s, 1 H), 7.74 (d, J=8.2 Hz, 1 H), 7.31 (d, J=1.5 Hz, 1 H), 7.24-7.28 (m, 1 H), 4.85 (d, J=2.4 Hz, 2H), 2.64 (t, J=2.4 Hz, 1H); LCMS (Method A) (ESI) m/e 239.0, 241.0 Br pattern [(M+H)+, calcd for C10H7BrO2 239.0]; SiO2 TLC (EtOAc:Hexane=1:9) indicated Rf of 0.32 compared with an Rf of 0.43 for starting material aldehyde. The resulting pale yellow solution was concentrated under reduced pressure EtOH (30 mL) was added to the residue the solution was concentrated under reduced pressure The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) The reaction mixture was stirred at ambient temperature for 22 h after which time the volatiles were concentrated under reduced pressure The residue was partitioned between EtOAc (70 mL) and water (40 mL) The organic layer was separated treated with charcoal (˜1 g) then dried (Na2SO4) filtered The filtrate was concentrated under reduced pressure The residue obtained was crystallized from EtOAc and hexane (3:7)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Conversion of 4-bromo-2-hydroxybenzaldehyde to its sodium salt was carried out as follows: A solution of 4-bromo-2-hydroxybenzaldehyde (3.0 g, 24.9 mmol) in MeOH (−150 mL) was treated with 1N aq. NaOH (15.7 mL, 1.05 equiv). The resulting pale yellow solution was concentrated under reduced pressure. EtOH (30 mL) was added to the residue and the solution was concentrated under reduced pressure. This was repeated with EtOH (30 mL) and then with heptane (50 mL). The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) with stirring and to it was added propargyl bromide in toluene (80 wt %, 2.33 mL, 1.4 equiv). The reaction mixture was stirred at ambient temperature for 22 h, after which time the volatiles were concentrated under reduced pressure. The residue was partitioned between EtOAc (70 mL) and water (40 mL). The organic layer was separated and treated with charcoal (˜1 g) then dried (Na2SO4) and filtered. The filtrate was concentrated under reduced pressure. The residue obtained was crystallized from EtOAc and hexane (3:7). Crop I afforded 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (893 mg) as colorless needles. The mother liquor was concentrated under reduced pressure and crystallized again from EtOAc and hexane (7:93) to obtain a further Crop II of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (1.902 g). The mother liquor was concentrated again and subjected to one more crystallization as described before. Crop III yielded additional 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (344 mg). All the three crops were combined to give a total of 3.14 g (87% yield) of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde as colorless needles. 1H NMR (500 MHz, CDCl3) δ 10.43 (s, 1 H), 7.74 (d, J=8.2 Hz, 1 H), 7.31 (d, J=1.5 Hz, 1 H), 7.24-7.28 (m, 1 H), 4.85 (d, J=2.4 Hz, 2H), 2.64 (t, J=2.4 Hz, 1H); LCMS (Method A) (ESI) m/e 239.0, 241.0 Br pattern [(M+H)+, calcd for C10H7BrO2 239.0]; SiO2 TLC (EtOAc:Hexane=1:9) indicated Rf of 0.32 compared with an Rf of 0.43 for starting material aldehyde. The resulting pale yellow solution was concentrated under reduced pressure EtOH (30 mL) was added to the residue the solution was concentrated under reduced pressure The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) The reaction mixture was stirred at ambient temperature for 22 h after which time the volatiles were concentrated under reduced pressure The residue was partitioned between EtOAc (70 mL) and water (40 mL) The organic layer was separated treated with charcoal (˜1 g) then dried (Na2SO4) filtered The filtrate was concentrated under reduced pressure The residue obtained was crystallized from EtOAc and hexane (3:7)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Conversion of 4-bromo-2-hydroxybenzaldehyde to its sodium salt was carried out as follows: A solution of 4-bromo-2-hydroxybenzaldehyde (3.0 g, 24.9 mmol) in MeOH (−150 mL) was treated with 1N aq. NaOH (15.7 mL, 1.05 equiv). The resulting pale yellow solution was concentrated under reduced pressure. EtOH (30 mL) was added to the residue and the solution was concentrated under reduced pressure. This was repeated with EtOH (30 mL) and then with heptane (50 mL). The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) with stirring and to it was added propargyl bromide in toluene (80 wt %, 2.33 mL, 1.4 equiv). The reaction mixture was stirred at ambient temperature for 22 h, after which time the volatiles were concentrated under reduced pressure. The residue was partitioned between EtOAc (70 mL) and water (40 mL). The organic layer was separated and treated with charcoal (˜1 g) then dried (Na2SO4) and filtered. The filtrate was concentrated under reduced pressure. The residue obtained was crystallized from EtOAc and hexane (3:7). Crop I afforded 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (893 mg) as colorless needles. The mother liquor was concentrated under reduced pressure and crystallized again from EtOAc and hexane (7:93) to obtain a further Crop II of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (1.902 g). The mother liquor was concentrated again and subjected to one more crystallization as described before. Crop III yielded additional 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (344 mg). All the three crops were combined to give a total of 3.14 g (87% yield) of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde as colorless needles. 1H NMR (500 MHz, CDCl3) δ 10.43 (s, 1 H), 7.74 (d, J=8.2 Hz, 1 H), 7.31 (d, J=1.5 Hz, 1 H), 7.24-7.28 (m, 1 H), 4.85 (d, J=2.4 Hz, 2H), 2.64 (t, J=2.4 Hz, 1H); LCMS (Method A) (ESI) m/e 239.0, 241.0 Br pattern [(M+H)+, calcd for C10H7BrO2 239.0]; SiO2 TLC (EtOAc:Hexane=1:9) indicated Rf of 0.32 compared with an Rf of 0.43 for starting material aldehyde. The resulting pale yellow solution was concentrated under reduced pressure EtOH (30 mL) was added to the residue the solution was concentrated under reduced pressure The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) The reaction mixture was stirred at ambient temperature for 22 h after which time the volatiles were concentrated under reduced pressure The residue was partitioned between EtOAc (70 mL) and water (40 mL) The organic layer was separated treated with charcoal (˜1 g) then dried (Na2SO4) filtered The filtrate was concentrated under reduced pressure The residue obtained was crystallized from EtOAc and hexane (3:7)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (0.852 g, 3.56 mmol) and formylmethylenetriphenylphosphorane (2.2 g, 7.12 mmol, 2 equiv) suspended in THF (20 mL) under nitrogen was stirred at ambient temperature for 18 h and then at 50° C. for another 24 h. The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL). The filtrate was concentrated under reduced pressure and the residue was purified by silica gel chromatography using a linear gradient of EtOAc:hexane (1:19 to 1:9). Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure to give (E)-3-(4-bromo-2-(prop-2-ynyloxy)phenyl)acrylaldehyde (0.69 g, 2.6 mmol, 57% yield). 1H NMR (500 MHz, CDCl3) δ 9.71 (d, J=7.6 Hz, 1H), 7.77 (d, J=16.2 Hz, 1H), 7.45 (d, J=8.2 Hz, 1H), 7.26-7.17 (m, 2H), 6.77 (dd, J=16.2, 7.6 Hz, 1H), 4.82 (d, J=2.4 Hz, 1H), 4.80-4.75 (m, 1H), 2.62 (t, J=2.4 Hz, 1H). The Z-isomer showed the aldehydic proton at δ 9.87 (d, J=7.9 Hz) and a smaller cis-coupling (J=11.4 Hz) for the olefinic proton at δ 6.22; LCMS (Method B) (ESI) m/e 265.0, 267.0 Br pattern [(M+H)+, calcd for C12H9BrO2 265.0]. at 50° C. for another 24 h The reaction mixture was filtered through a bed of silica gel (˜25 g) eluting with EtOAc:hexane (1:4, 300 mL) The filtrate was concentrated under reduced pressure the residue was purified by silica gel chromatography Pooled fractions containing the title compound and its Z-isomer in the ratio of (39:11, by NMR) was concentrated under reduced pressure

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Conversion of 4-bromo-2-hydroxybenzaldehyde to its sodium salt was carried out as follows: A solution of 4-bromo-2-hydroxybenzaldehyde (3.0 g, 24.9 mmol) in MeOH (˜150 mL) was treated with 1N aq. NaOH (15.7 mL, 1.05 equiv). The resulting pale yellow solution was concentrated under reduced pressure. EtOH (30 mL) was added to the residue and the solution was concentrated under reduced pressure. This was repeated with EtOH (30 mL) and then with heptane (50 mL). The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) with stirring and to it was added propargyl bromide in toluene (80 wt %, 2.33 mL, 1.4 equiv). The reaction mixture was stirred at ambient temperature for 22 h, after which time the volatiles were concentrated under reduced pressure. The residue was partitioned between EtOAc (70 mL) and water (40 mL). The organic layer was separated and treated with charcoal (˜1 g) then dried (Na2SO4) and filtered. The filtrate was concentrated under reduced pressure. The residue obtained was crystallized from EtOAc and hexane (3:7). Crop I afforded 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (893 mg) as colorless needles. The mother liquor was concentrated under reduced pressure and crystallized again from EtOAc and hexane (7:93) to obtain a further Crop II of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (1.902 g). The mother liquor was concentrated again and subjected to one more crystallization as described before. Crop III yielded additional 4-bromo-2-(prop-2-ynyloxy)benzaldehyde (344 mg). All the three crops were combined to give a total of 3.14 g (87% yield) of 4-bromo-2-(prop-2-ynyloxy)benzaldehyde as colorless needles. 1H NMR (500 MHz, CDCl3) δ 10.43 (s, 1H), 7.74 (d, J=8.2 Hz, 1H), 7.31 (d, J=1.5 Hz, 1H), 7.24-7.28 (m, 1H), 4.85 (d, J=2.4 Hz, 2H), 2.64 (t, J=2.4 Hz, 1H); LCMS (Method A) (ESI) m/e 239.0, 241.0 Br pattern [(M+H)+, calcd for C10H7BrO2 239.0]; SiO2 TLC (EtOAc:Hexane=1:9) indicated Rf of 0.32 compared with an Rf of 0.43 for starting material aldehyde. The resulting pale yellow solution was concentrated under reduced pressure EtOH (30 mL) was added to the residue the solution was concentrated under reduced pressure The resulting yellow, powdery sodium salt was dissolved in DMF (60 mL) The reaction mixture was stirred at ambient temperature for 22 h after which time the volatiles were concentrated under reduced pressure The residue was partitioned between EtOAc (70 mL) and water (40 mL) The organic layer was separated treated with charcoal (˜1 g) then dried (Na2SO4) filtered The filtrate was concentrated under reduced pressure The residue obtained was crystallized from EtOAc and hexane (3:7)