tert-butyl (2R)-2-hydroxypropanoate

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

実験手順: Step 3′: t-Butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was prepared from (R)-2-hydroxy-propionic acid tert-butyl ester (602 mg, 4.12 mmol), triflic anhydride (0.696 mL, 4.12 mmol) and 2,6-lutidine (0.480 mL, 4.12 mmol) in DCM (5 mL). To a suspension of ((S)-2-amino-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester hydrochloride (600 mg, 1.38 mmol) in dichloromethane (10 mL) was added triethylamine (0.574 mL, 4.12 mmol) at 0° C. After stirred for 10 min, a half amount of the freshly prepared t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was added at room temperature and stirred for 1 hour. Additional triethylamine (0.574 mL, 4.12 mmol) and the rest of t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate were added at room temperature and stirred for additional 2 hours. The reaction mixture was washed with H2O and the organic layer was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (EtOAc/heptane) to give (S)-2-((S)-1-tert-butoxycarbonyl-ethylamino)-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester (580 mg). 1H NMR (400 MHz, CDCl3) δ 1.24 (t, 3H, J=6.8 Hz), 1.41 (s, 9H), 3.00-3.07 (m, 2H), 3.26 (dd, 1H, J=7.1, 13.9 Hz), 3.70 (dd, 1H, J=7.1, 7.1 Hz), 5.09 (s, 2H), 7.20-7.42 (m, 12H); MS: m/z (MH+) 528. stirred for 1 hour stirred for additional 2 hours The reaction mixture was washed with H2O the organic layer was concentrated under reduced pressure The obtained residue was purified by silica gel column chromatography (EtOAc/heptane)

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

実験手順: Step 3′: t-Butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was prepared from (R)-2-hydroxy-propionic acid tert-butyl ester (602 mg, 4.12 mmol), triflic anhydride (0.696 mL, 4.12 mmol) and 2,6-lutidine (0.480 mL, 4.12 mmol) in DCM (5 mL). To a suspension of ((S)-2-amino-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester hydrochloride (600 mg, 1.38 mmol) in dichloromethane (10 mL) was added triethylamine (0.574 mL, 4.12 mmol) at 0° C. After stirred for 10 min, a half amount of the freshly prepared t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was added at room temperature and stirred for 1 hour. Additional triethylamine (0.574 mL, 4.12 mmol) and the rest of t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate were added at room temperature and stirred for additional 2 hours. The reaction mixture was washed with H2O and the organic layer was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (EtOAc/heptane) to give (S)-2-(S)-1-tert-butoxycarbonyl-ethylamino)-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester (580 mg). 1H NMR (400 MHz, CDCl3) δ 1.24 (t, 3H, J=6.8 Hz), 1.41 (s, 9H), 3.00-3.07 (m, 2H), 3.26 (dd, 1H, J=7.1, 13.9 Hz), 3.70 (dd, 1H, J=7.1, 7.1 Hz), 5.09 (s, 2H), 7.20-7.42 (m, 12H); MS: m/z (MH+) 528. stirred for 1 hour stirred for additional 2 hours The reaction mixture was washed with H2O the organic layer was concentrated under reduced pressure The obtained residue was purified by silica gel column chromatography (EtOAc/heptane)

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

実験手順: Step 3′: t-Butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was prepared from (R)-2-hydroxy-propionic acid tert-butyl ester (602 mg, 4.12 mmol), triflic anhydride (0.696 mL, 4.12 mmol) and 2,6-lutidine (0.480 mL, 4.12 mmol) in DCM (5 mL). To a suspension of ((S)-2-amino-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester hydrochloride (600 mg, 1.38 mmol) in dichloromethane (10 mL) was added triethylamine (0.574 mL, 4.12 mmol) at 0° C. After stirred for 10 min, a half amount of the freshly prepared t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was added at room temperature and stirred for 1 hour. Additional triethylamine (0.574 mL, 4.12 mmol) and the rest of t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate were added at room temperature and stirred for additional 2 hours. The reaction mixture was washed with H2O and the organic layer was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (EtOAc/heptane) to give (S)-2-((S)-1-tert-butoxycarbonyl-ethylamino)-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester (580 mg). 1H NMR (400 MHz, CDCl3) δ 1.24 (t, 3H, J=6.8 Hz), 1.41 (s, 9H), 3.00-3.07 (m, 2H), 3.26 (dd, 1H, J=7.1, 13.9 Hz), 3.70 (dd, 1H, J=7.1, 7.1 Hz), 5.09 (s, 2H), 7.20-7.42 (m, 12H); MS: m/z (MH+) 528. stirred for 1 hour stirred for additional 2 hours The reaction mixture was washed with H2O the organic layer was concentrated under reduced pressure The obtained residue was purified by silica gel column chromatography (EtOAc/heptane)

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

実験手順: DIAD (3 ml) was added to a mixture of the product from step b) (3.51 g), triphenyl phosphine (3.98 g), tert-butyl (R)-(+) lactate (2.02 g) and THF (80 ml) at 0° C. overnight. The mixture was concentrated in vacuo. The residue was purified by flash column chromatography eluting with isohexane:ethyl acetate (7:3) to give the sub-title compound (4 g). The intermediate obtained was dissolved in acetone and 1M HCl (15 ml) was added, stirred for 20 min, then concentrated in vacuo. Redissolved in dichloromethane (10 ml) and added TFA (5 ml). Stirred for 2 h, then added water (1 ml), stirred for 1 h. The reaction mixture was then diluted (water) and made alkaline by adding dilute NaOH. The organic layer was separated and discarded. The aqueous phase was acidified with concentrated HCl to pH1, then washed with dichloromethane (×2). These organic extracts were dried (MgSO4) then concentrated in vacuo to give the sub-title compound. Yield 1.4 g The mixture was concentrated in vacuo The residue was purified by flash column chromatography eluting with isohexane:ethyl acetate (7:3)

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

実験手順: The subtitle compound was prepared by the method of Example 2 step a) using the product from step e) and tert-butyl (R)-(+) lactate.

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

実験手順: The subtitle compound was prepared by the method of Example 2 step a) using the product from step e) and tert-butyl (R)-(+) lactate.

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

実験手順: Following the procedure of Example 426, 2-[2-(2,2,2-trifluoro-ethyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-ol and 2-hydroxy-3-methyl-butyric acid methyl ester and (R)-2-hydroxy-propionic acid tert-butyl ester were reacted and the crude product was subjected to flash chromatography (SiO2, gradient 0-10% methanol in ethyl acetate) to give (S)-2-{2-[2-(2,2,2-Trifluoro-ethyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yloxy}-propionic acid tert-butyl ester as a yellow oil contaminated with triphenylphosphine oxide. LCMS: RT=3.86 min, [M+H]+=480 were reacted

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

実験手順: Following the procedures of Example 426, 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-ol 490 and (+)-tert-butyl d-lactate were reacted and the crude product was subjected to flash chromatography (SiO2, gradient 0-7% methanol in DCM) to give (S)-2-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yloxy]-propionic acid tert-butyl ester as a yellow solid (70 mg, 62%). LCMS: RT=3.76 min, [M+H]+=440. were reacted

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

実験手順: 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a,9-triaza-benzo[e]azulen-8-ol from Example 93, (+)-tert-butyl d-lactate, diisopropylazodicarboxylate (DIAD), and triphenylphosphine were reacted in THF. The crude product was subjected to flash chromatography (SiO2, gradient 0-5% methanol in DCM) to give (S)-2-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a,9-triaza-benzo[e]azulen-8-yloxy]-propionic acid tert-butyl ester as a yellow oil contaminated with triphenylphosphine oxide, no further purification was undertaken (206 mg, 49% based on NMR quantification of PPh3O). LCMS: RT=3.74 min, [M+H]+=441

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

実験手順: 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a,9-triaza-benzo[e]azulen-8-ol from Example 93, (+)-tert-butyl d-lactate, diisopropylazodicarboxylate (DIAD), and triphenylphosphine were reacted in THF. The crude product was subjected to flash chromatography (SiO2, gradient 0-5% methanol in DCM) to give (S)-2-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a,9-triaza-benzo[e]azulen-8-yloxy]-propionic acid tert-butyl ester as a yellow oil contaminated with triphenylphosphine oxide, no further purification was undertaken (206 mg, 49% based on NMR quantification of PPh3O). LCMS: RT=3.74 min, [M+H]+=441

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

実験手順: Step 3′: t-Butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was prepared from (R)-2-hydroxy-propionic acid tert-butyl ester (602 mg, 4.12 mmol), triflic anhydride (0.696 mL, 4.12 mmol) and 2,6-lutidine (0.480 mL, 4.12 mmol) in DCM (5 mL). To a suspension of ((S)-2-amino-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester hydrochloride (600 mg, 1.38 mmol) in dichloromethane (10 mL) was added triethylamine (0.574 mL, 4.12 mmol) at 0° C. After stirred for 10 min, a half amount of the freshly prepared t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate was added at room temperature and stirred for 1 hour. Additional triethylamine (0.574 mL, 4.12 mmol) and the rest of t-butyl (R)-2-(trifluoromethylsulfonyloxy)propionate were added at room temperature and stirred for additional 2 hours. The reaction mixture was washed with H2O and the organic layer was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (EtOAc/heptane) to give (S)-2-(S)-1-tert-butoxycarbonyl-ethylamino)-3-(2′,5′-dichloro-biphenyl-4-yl)-propionic acid benzyl ester. 1H NMR (400 MHz, CDCl3) δ 1.24 (t, 3H, J=6.8 Hz), 1.41 (s, 9H), 3.00-3.07 (m, 2H), 3.26 (dd, 1H, J=7.1, 13.9 Hz), 3.70 (dd, 1H, J=7.1, 7.1 Hz), 5.09 (s, 2H), 7.20-7.42 (m, 12H); MS: m/z (MH+) 528. stirred for 1 hour stirred for additional 2 hours The reaction mixture was washed with H2O the organic layer was concentrated under reduced pressure The obtained residue was purified by silica gel column chromatography (EtOAc/heptane)

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

実験手順: To a mixture of 980 mg of (3RS,4RS)-3-(2,4-dichlorophenyl)-2[(1SR,2SR)-2-hydroxycyclohexyl]-N-[2-(3-hydroxyphenyl)ethyl]-1-oxo-1,2,3,4-tetrahydroisoquinoline-4-carboxamide, 1160 mg of triphenylphosphine, 1080 mg of tert-butyl (2R)-2-hydroxypropanate, and 30 mL of THF was added 770 mg of diethyl azodicarboxylate at room temperature, followed by stifling for 12 hours. The reaction solution was diluted with ethyl acetate and washed with a saturated aqueous sodium hydrogen carbonate solution. The organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (eluent: chloroform-methanol) to obtain 1460 mg of tert-butyl (2S)-2-(3-{2-[({(3RS,4RS)-3-(2,4-dichlorophenyl)-2-[(1SR,2SR)-2-hydroxycyclohexyl]-1-oxo-1,2,3,4-tetrahydroisoquinolin-4-yl}carbonyl)amino]ethyl}phenoxy)propanate as a yellow solid. washed with a saturated aqueous sodium hydrogen carbonate solution The organic layer was dried over anhydrous magnesium sulfate concentrated under reduced pressure The obtained residue was purified by silica gel column chromatography (eluent: chloroform-methanol)