(1R,2R)-2-methylcyclohexan-1-ol

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

実験手順: N-Benzyloxycarbonyl-D-alanine (2.5 mmol. 0.556 g) and trans-2-methylcyclohexanol (3 equivalents, 1 mL) were dissolved in 7 mL THF at room temperature, followed by the addition of 70 mg 4-dimethylaminopyridine. DCC (2.5 mmol, 0.515 g) was then introduced with stirring. The solution turned cloudy immediately and was stirred at room temperature overnight. The reaction mixture was stirred for another 15 min after several drops of HOAc were added to it. Dicyclohexylurea (DCU) was filtered off and the filtrate evaporated to dryness. The residue was dissolved in ethyl acetate. The EtOAc solution was filtered, washed with 0.5N HCl (2×), brine (2×), 5% NaHCO3 (2×) and finally brine (2×). The organic phase, after being dried over anhydrous Na2SO4, showed one UV-positive tlc spot. A second spot, which could only be detected by phosphomolybdic acid (PMA)--Ce(SO4)2 spray, was identified as the unreacted alcohol by tlc comparison with authentic material. The ethyl acetate solution was evaporated to dryness and dried under high vacuum, giving a clear oil weighing 0.965 g. The crude material was chromatographed on a Merck Si--60 size C prepacked column by gradient elution with toluene to toluene:ethyl acetate (9:1). After evaporation, 0.629 g (72.0%) of clear, colorless oil was recovered: nmr (CDCl3, ppm), 0.85-2.05 (13H, m, aliphatic H of cyclohexanol), 0.9 (3H, d, J=6 Hz, CH3) 1.3 (3H, d, J=7 Hz, obscured by other aliphatic protons, β--CH3 of Ala), 4.3 (2H, m, CH--O-- and α--H), 5 (2H, s, ArCH2 --), 5.25 (1H, broad s, amide H), 7.15 (5H, s, ArH5). was stirred at room temperature overnight were added to it Dicyclohexylurea (DCU) was filtered off the filtrate evaporated to dryness The residue was dissolved in ethyl acetate The EtOAc solution was filtered washed with 0.5N HCl (2×), brine (2×), 5% NaHCO3 (2×) and finally brine (2×) The organic phase, after being dried over anhydrous Na2SO4 The ethyl acetate solution was evaporated to dryness dried under high vacuum giving a clear oil The crude material was chromatographed on a Merck Si 60 size C prepacked column by gradient elution with toluene to toluene:ethyl acetate (9:1) After evaporation, 0.629 g (72.0%) of clear, colorless oil was recovered

反応条件: temp:-20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Dissolve trans-2-methyl-cyclohexanol (5.0 g, 44.0 mmol) in anhydrous THF (500 mL) and cool to −20° C. Add triphenylphosphine (57.43 g, 218.9 mmol), diethyl azodicarboxylate (38.13 g, 218.9 mmol), and diphenylphosphoryl azide (60.25 g, 218.9 mmol) respectively under nitrogen. Stir the reaction mixture for 6 hours at the same temperature then warm it to room temperature and stir overnight Add water (500 mL), and extract the aqueous layer with EtOAc (3×500 mL). Combine the organic layers and dry with Na2SO4, filter, concentrate and purify by flash column chromatography (silica gel, 0-25% of EtOAc/Hexane) to give 3.98 g (65%) of the title compound as a colorless oil: 1H NMR (CDCl3) δ 3.08-3.16 (m, 1H), 1.90-1.98 (m, 1H), 1.56-1.78 (m, 3H), 1.16-1.35 (m, 4H), 1.01 (d, 3H), 0.93-1.03 (m, 1H). then warm it to room temperature stir overnight extract the aqueous layer with EtOAc (3×500 mL) Combine the organic layers and dry with Na2SO4 filter concentrate purify by flash column chromatography (silica gel, 0-25% of EtOAc/Hexane)

反応条件: temp:-20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: Dissolve trans-2-methyl-cyclohexanol (5.0 g, 44.0 mmol) in anhydrous THF (500 mL) and cool to −20° C. Add triphenylphosphine (57.43 g, 218.9 mmol), diethyl azodicarboxylate (38.13 g, 218.9 mmol), and diphenylphosphoryl azide (60.25 g, 218.9 mmol) respectively under nitrogen. Stir the reaction mixture for 6 hours at the same temperature then warm it to room temperature and stir overnight Add water (500 mL), and extract the aqueous layer with EtOAc (3×500 mL). Combine the organic layers and dry with Na2SO4, filter, concentrate and purify by flash column chromatography (silica gel, 0-25% of EtOAc/Hexane) to give 3.98 g (65%) of the title compound as a colorless oil: 1H NMR (CDCl3) δ 3.08-3.16 (m, 1H), 1.90-1.98 (m, 1H), 1.56-1.78 (m, 3H), 1.16-1.35 (m, 4H), 1.01 (d, 3H), 0.93-1.03 (m, 1H). then warm it to room temperature stir overnight extract the aqueous layer with EtOAc (3×500 mL) Combine the organic layers and dry with Na2SO4 filter concentrate purify by flash column chromatography (silica gel, 0-25% of EtOAc/Hexane)

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

実験手順: To a mixture of 1-chloroethyl chloroformate [CSA No. 50893-53-3] (0.416 mL), pyridine (0.624 mL), and THF (25 mL), (1R,2R)-2-methylcyclohexanol [CSA No. 19043-03-9] (441 mg) dissolved in THF (5 mL) was added at −78° C. After stirring the mixture overnight at room temperature, ethyl acetate (100 mL) and heptane (100 mL) were added to the mixture. The resulting mixture was sequentially washed with 0.5 N hydrochloric acid (50 mL), saturated aqueous sodium hydrogen carbonate solution (50 mL), water (50 mL), and saturated aqueous sodium chloride solution (50 mL), and dried over anhydrous magnesium sulfate. The resulting mixture was filtered, and the filtrate obtained was concentrated under reduced pressure to obtain the captioned compound (482 mg). was added at −78° C The resulting mixture was sequentially washed with 0.5 N hydrochloric acid (50 mL), saturated aqueous sodium hydrogen carbonate solution (50 mL), water (50 mL), and saturated aqueous sodium chloride solution (50 mL) dried over anhydrous magnesium sulfate The resulting mixture was filtered the filtrate obtained was concentrated under reduced pressure

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In 4 ml of tetrahydrofuran was suspended 0.11 g of sodium hydride (60% in oil), to which 1 ml of a tetrahydrofuran solution containing 0.25 g of trans-2-methylcyclohexanol was slowly added dropwise with stirring at 0° C. The mixture was stirred at 0° C. for 10 minutes, to which 1 ml of a tetrahydrofuran solution containing 0.3 g of 4,6-dichloropyrimidine was added at 0° C., followed by further stirring at room temperature for 3 hours. The reaction mixture was then poured into a saturated aqueous ammonium chloride solution and extracted three times with ethyl acetate. The organic layers were combined, washed with water, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 0.18 g of 4-chloro-6-(trans-2-methylcyclohexyloxy)pyrimidine. was slowly added dropwise was added at 0° C. by further stirring at room temperature for 3 hours extracted three times with ethyl acetate washed with water dried over anhydrous magnesium sulfate concentrated

反応条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: In 4 ml of tetrahydrofuran was suspended 0.11 g of sodium hydride (60% in oil), to which 1 ml of a tetrahydrofuran solution containing 0.25 g of trans-2-methylcyclohexanol was slowly added dropwise with stirring at 0° C. The mixture was stirred at 0° C. for 10 minutes, to which 1 ml of a tetrahydrofuran solution containing 0.3 g of 4,6-dichloropyrimidine was added at 0° C., followed by further stirring at room temperature for 3 hours. The reaction mixture was then poured into a saturated aqueous ammonium chloride solution and extracted three times with ethyl acetate. The organic layers were combined, washed with water, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 0.18 g of 4-chloro-6-(trans-2-methylcyclohexyloxy)pyrimidine. was slowly added dropwise was added at 0° C. by further stirring at room temperature for 3 hours extracted three times with ethyl acetate washed with water dried over anhydrous magnesium sulfate concentrated

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

実験手順: Ethyl (Z)-2-hydroxyimino-3-oxobutyrate (3.48 g) was reacted with trans-2-methylcyclohexanol as described in Example 4a, method 3 to give the title compound (0.476 g, 8.5%), as a colourless liquid, νmax (film) 2930, 1740 and 1690 cm-1, δH (CDCl3) 0.95 (3H, d, J 6.9 Hz), 1.34 (3H, t), 1.3-2.1 (9H, m), 2.40 (3H, s), 4.36 (2H, q), and 4.39 (1H, m).

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

実験手順: A mixture of 3.45 (10 mmol) of ethyl (S)-8-chloro-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate, 11.4 g (100 mmol) of trans-2-methylcyclohexanol and 100 mg of powdered potassium cyanide is stirred at 130° for 6 hours, the solution obtained is evaporated to dryness and the residue is chromatographed on a silica gel column. By recrystallization from ethyl acetate there is obtained trans-2-methylcyclohexyl (S)-8-chloro-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate of melting point 213°-215° (1:1 mixture of the two diastereoisomers). the solution obtained is evaporated to dryness the residue is chromatographed on a silica gel column By recrystallization from ethyl acetate

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

実験手順: N-Benzyloxycarbonyl-D-alanine (2.5 mmol. 0.556 g) and trans-2-methylcyclohexanol (3 equivalents, 1 mL) were dissolved in 7 mL THF at room temperature, followed by the addition of 70 mg 4-dimethylaminopyridine. DCC (2.5 mmol, 0.515 g) was then introduced with stirring. The solution turned cloudy immediately and was stirred at room temperature overnight. The reaction mixture was stirred for another 15 min after several drops of HOAc were added to it. Dicyclohexylurea (DCU) was filtered off and the filtrate evaporated to dryness. The residue was dissolved in ethyl acetate. The EtOAc solution was filtered, washed with 0.5N HCl (2×), brine (2×), 5% NaHCO3 (2×) and finally brine (2×). The organic phase, after being dried over anhydrous Na2SO4, showed one UV-positive tlc spot. A second spot, which could only be detected by phosphomolybdic acid (PMA)--Ce(SO4)2 spray, was identified as the unreacted alcohol by tlc comparison with authentic material. The ethyl acetate solution was evaporated to dryness and dried under high vacuum, giving a clear oil weighing 0.965 g. The crude material was chromatographed on a Merck Si--60 size C prepacked column by gradient elution with toluene to toluene:ethyl acetate (9:1). After evaporation, 0.629 g (72.0%) of clear, colorless oil was recovered: nmr (CDCl3, ppm), 0.85-2.05 (13H, m, aliphatic H of cyclohexanol), 0.9 (3H, d, J=6 Hz, CH3) 1.3 (3H, d, J=7 Hz, obscured by other aliphatic protons, β--CH3 of Ala), 4.3 (2H, m, CH--O-- and α--H), 5 (2H, s, ArCH2 --), 5.25 (1H, broad s, amide H), 7.15 (5H, s, ArH5). was stirred at room temperature overnight were added to it Dicyclohexylurea (DCU) was filtered off the filtrate evaporated to dryness The residue was dissolved in ethyl acetate The EtOAc solution was filtered washed with 0.5N HCl (2×), brine (2×), 5% NaHCO3 (2×) and finally brine (2×) The organic phase, after being dried over anhydrous Na2SO4 The ethyl acetate solution was evaporated to dryness dried under high vacuum giving a clear oil The crude material was chromatographed on a Merck Si 60 size C prepacked column by gradient elution with toluene to toluene:ethyl acetate (9:1) After evaporation, 0.629 g (72.0%) of clear, colorless oil was recovered