(S)-(-)-1-(4-溴苯基)乙基异氰酸酯

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 1-chloro-5-methyl-3-phenylhex-5-en-3-ol (2.9 g, 13 mmol), (S)-1-bromo-4-(1-isocyanatoethyl)benzene (3.5 g, 16 mmol), and DBU (8 g, 33 mmol) in THF (80 mL) was heated at reflux overnight. The mixture was diluted with EtOAc, and washed with 1 N aq HCl. The aqueous phase was extracted with EtOAc (3×), and the combined organic phase was dried over Na2SO4. After the solvents were evaporated, the crude product was purified by column chromatography to give (R)-3-((S)-1-(4-bromophenyl)-ethyl)-6-(2-methylallyl)-6-phenyl-1,3-oxazinan-2-one (1.62 g, yield: 30%). was heated at reflux overnight washed with 1 N aq HCl The aqueous phase was extracted with EtOAc (3×) the combined organic phase was dried over Na2SO4 After the solvents were evaporated the crude product was purified by column chromatography

反应条件: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 10 L jacketed reactor was charged 241 g of sodium bicarbonate (2.87 mol, 2.30 equiv) and 5 L of deionized water. The resulting solution was agitated for 10-20 min, until the solids dissolved (homogeneous). To the clear solution was charged 250 g (1.25 mol, 1.00 equiv) of (S)-(−)-1-(4-bromophenyl)ethylamine as a solution in 1.00 L of dichloromethane. An additional 4 L of dichloromethane was charged to the reactor. The biphasic solution was agitated and cooled to Tint=2-3° C. Triphosgene (126 g, 424 mmol, 0.340 equiv) was charged to the reactor in approximately two equal portions ˜6 min apart. It should be noted that a slight exotherm was noted upon the addition of triphosgene. The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis indicates >99 A % conversion (220 nm). The dichloromethane layer was cut and dried with anhydrous sulfate. The resulting solution was passed through a celite plug and concentrated to ˜1.5 L which fine particles of a white solid developed. The solution was filtered and concentrated to a thick oil via reduced pressure to produce 239 g of 1-bromo-4-((S)-1-isocyanato-ethyl)-benzene (93.7 wt %, 79.4% yield). 1H-NMR spectroscopy (400 MHz, CD2Cl2) δ 7.53 (d, J=11.4 Hz, 2 H), 7.26 (d, J=8.2 Hz, 2 H), 4.80 (q, J=6.7 Hz, 1H), 1.59 (d, J=6.7 Hz, 3 H). The material was used in Step 3 without further purification. dissolved (homogeneous) The biphasic solution was agitated The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis dried with anhydrous sulfate concentrated to ˜1.5 L which fine particles of a white solid The solution was filtered concentrated to a thick oil via reduced pressure

反应条件: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a dried 10 L jacketed reactor under a nitrogen atmosphere was charged 1-chloro-5-methyl-3-phenyl-hex-5-en-3-ol (167 g, 81.7 wt %, 610 mmol, 1.00 equiv), 1-bromo-4-((S)-1-isocyanato-ethyl)-benzene (219 g, 93.7 wt %, 911 mmol, 1.50 equiv), anhydrous tetrahydrofuran (3.00 L), and then 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU, 409 mL, 2.73 mol, 4.50 equiv). The resulting solution was agitated and refluxed (Tint=67-69° C., Text=75° C.) for 19 h, at which point HPLC analysis indicated ˜1A % (220 nm) of the 1-chloro-5-methyl-3-phenyl-hex-5-en-3-ol remained. The dark solution was cooled to Tint=20-25° C. Two liters of tetrahydrofuran were removed by distillation under reduced pressure. The remaining dark solution was diluted with 4.0 L of ethyl acetate and 1.0 L of hexanes. The resulting solution was washed with 4.0 L of a 1.0 M aqueous solution of hydrogen chloride (note: the wash is slightly exothermic). The aqueous solution was cut and the remaining organic solution was dried with anhydrous sodium sulfate, filtered and then concentrated to an oil via reduced pressure. The resulting material was subjected to flash silica chromatography (5-30% ethyl acetate/hexanes, 1.74 kg of silica) to produce 137.8 g of material (59 wt %, 3.1:1 diastereomeric ratio favoring the desired diastereomer The dark solution was cooled to Tint=20-25° C Two liters of tetrahydrofuran were removed by distillation under reduced pressure The remaining dark solution was diluted with 4.0 L of ethyl acetate and 1.0 L of hexanes The resulting solution was washed with 4.0 L of a 1.0 M aqueous solution of hydrogen chloride (note the remaining organic solution was dried with anhydrous sodium sulfate filtered concentrated to an oil via reduced pressure

反应条件: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 10 L jacketed reactor was charged 241 g of sodium bicarbonate (2.87 mol, 2.30 equiv) and 5 L of deionized water. The resulting solution was agitated for 10-20 min, until the solids dissolved (homogeneous). To the clear solution was charged 250 g (1.25 mol, 1.00 equiv) of (S)-(−)-1-(4-bromophenyl)ethylamine as a solution in 1.00 L of dichloromethane. An additional 4 L of dichloromethane was charged to the reactor. The biphasic solution was agitated and cooled to Tint=2-3° C. Triphosgene (126 g, 424 mmol, 0.340 equiv) was charged to the reactor in approximately two equal portions ˜6 min apart. It should be noted that a slight exotherm was noted upon the addition of triphosgene. The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis indicates >99 A % conversion (220 nm). The dichloromethane layer was cut and dried with anhydrous sulfate. The resulting solution was passed through a celite plug and concentrated to ˜1.5 L which fine particles of a white solid developed. The solution was filtered and concentrated to a thick oil via reduced pressure to produce 239 g of 1-bromo-4-((S)-1-isocyanato-ethyl)-benzene (93.7 wt %, 79.4% yield). 1H-NMR spectroscopy (400 MHz, CD2Cl2) δ 7.53 (d, J=11.4 Hz, 2H), 7.26 (d, J=8.2 Hz, 2H), 4.80 (q, J=6.7 Hz, 1H), 1.59 (d, J=6.7 Hz, 3H). The material was used in Step 3 without further purification. dissolved (homogeneous) The biphasic solution was agitated The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis dried with anhydrous sulfate concentrated to ˜1.5 L which fine particles of a white solid The solution was filtered concentrated to a thick oil via reduced pressure

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 1-chloro-5-methyl-3-phenylhex-5-en-3-ol (2.9 g, 13 mmol), (S)-1-bromo-4-(1-isocyanatoethyl)benzene (3.5 g, 16 mmol), and DBU (8 g, 33 mmol) in THF (80 mL) was heated at reflux overnight. The mixture was diluted with EtOAc, and washed with 1N aq HCl. The aqueous phase was extracted with EtOAc (3×), and the combined organic phase was dried over Na2SO4. After the solvents were evaporated, the crude product was purified by column chromatography to give (R)-3-((S)-1-(4-bromophenyl)-ethyl)-6-(2-methylallyl)-6-phenyl-1,3-oxazinan-2-one (1.62 g, yield: 30%). was heated at reflux overnight washed with 1N aq HCl The aqueous phase was extracted with EtOAc (3×) the combined organic phase was dried over Na2SO4 After the solvents were evaporated the crude product was purified by column chromatography

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 1-chloro-5-methyl-3-phenylhex-5-en-3-ol (2.9 g, 13 mmol), (S)-1-bromo-4-(1-isocyanatoethyl)benzene (3.5 g, 16 mmol), and DBU (8 g, 33 mmol) in THF (80 mL) was heated at reflux overnight. The mixture was diluted with EtOAc, and washed with 1N aq HCl. The aqueous phase was extracted with EtOAc (3×), and the combined organic phase was dried over Na2SO4. After the solvents were evaporated, the crude product was purified by column chromatography to give (R)-3-((S)-1-(4-bromophenyl)-ethyl)-6-(2-methylallyl)-6-phenyl-1,3-oxazinan-2-one (1.62 g, yield: 30%). was heated at reflux overnight washed with 1N aq HCl The aqueous phase was extracted with EtOAc (3×) the combined organic phase was dried over Na2SO4 After the solvents were evaporated the crude product was purified by column chromatography

反应条件: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 10 L jacketed reactor was charged 241 g of sodium bicarbonate (2.87 mol, 2.30 equiv) and 5 L of deionized water. The resulting solution was agitated for 10-20 min, until the solids dissolved (homogeneous). To the clear solution was charged 250 g (1.25 mol, 1.00 equiv) of (S)-(−)-1-(4-bromophenyl)ethylamine as a solution in 1.00 L of dichloromethane. An additional 4 L of dichloromethane was charged to the reactor. The biphasic solution was agitated and cooled to Tint=2-3° C. Triphosgene (126 g, 424 mmol, 0.340 equiv) was charged to the reactor in approximately two equal portions ˜6 min apart. It should be noted that a slight exotherm was noted upon the addition of triphosgene. The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis indicates >99 A % conversion (220 nm). The dichloromethane layer was cut and dried with anhydrous sulfate. The resulting solution was passed through a celite plug and concentrated to ˜1.5 L which fine particles of a white solid developed. The solution was filtered and concentrated to a thick oil via reduced pressure to produce 239 g of 1-bromo-4-((S)-1-isocyanato-ethyl)-benzene (93.7 wt %, 79.4% yield). 1H-NMR spectroscopy (400 MHz, CD2Cl2) δ 7.53 (d, J=11.4 Hz, 2H), 7.26 (d, J=8.2 Hz, 2H), 4.80 (q, J=6.7 Hz, 1H), 1.59 (d, J=6.7 Hz, 3H). The material was used in Step 3 without further purification. dissolved (homogeneous) The biphasic solution was agitated The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis dried with anhydrous sulfate concentrated to ˜1.5 L which fine particles of a white solid The solution was filtered concentrated to a thick oil via reduced pressure

反应条件: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 10 L jacketed reactor was charged 241 g of sodium bicarbonate (2.87 mol, 2.30 equiv) and 5 L of deionized water. The resulting solution was agitated for 10-20 min, until the solids dissolved (homogeneous). To the clear solution was charged 250 g (1.25 mol, 1.00 equiv) of (S)-(−)-1-(4-bromophenyl)ethylamine as a solution in 1.00 L of dichloromethane. An additional 4 L of dichloromethane was charged to the reactor. The biphasic solution was agitated and cooled to Tint=2-3° C. Triphosgene (126 g, 424 mmol, 0.340 equiv) was charged to the reactor in approximately two equal portions ˜6 min apart. It should be noted that a slight exotherm was noted upon the addition of triphosgene. The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis indicates >99 A % conversion (220 nm). The dichloromethane layer was cut and dried with anhydrous sulfate. The resulting solution was passed through a celite plug and concentrated to ˜1.5 L which fine particles of a white solid developed. The solution was filtered and concentrated to a thick oil via reduced pressure to produce 239 g of 1-bromo-4-((S)-1-isocyanato-ethyl)-benzene (93.7 wt %, 79.4% yield). 1H-NMR spectroscopy (400 MHz, CD2Cl2) δ 7.53 (d, J=11.4 Hz, 2H), 7.26 (d, J=8.2 Hz, 2H), 4.80 (q, J=6.7 Hz, 1H), 1.59 (d, J=6.7 Hz, 3H). The material was used in Step 3 without further purification. dissolved (homogeneous) The biphasic solution was agitated The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis dried with anhydrous sulfate concentrated to ˜1.5 L which fine particles of a white solid The solution was filtered concentrated to a thick oil via reduced pressure

反应条件: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 10 L jacketed reactor was charged 241 g of sodium bicarbonate (2.87 mol, 2.30 equiv) and 5 L of deionized water. The resulting solution was agitated for 10-20 min, until the solids dissolved (homogeneous). To the clear solution was charged 250 g (1.25 mol, 1.00 equiv) of (S)-(−)-1-(4-bromophenyl)ethylamine as a solution in 1.00 L of dichloromethane. An additional 4 L of dichloromethane was charged to the reactor. The biphasic solution was agitated and cooled to Tint=2-3° C. Triphosgene (126 g, 424 mmol, 0.340 equiv) was charged to the reactor in approximately two equal portions ˜6 min apart. It should be noted that a slight exotherm was noted upon the addition of triphosgene. The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis indicates >99 A % conversion (220 nm). The dichloromethane layer was cut and dried with anhydrous sulfate. The resulting solution was passed through a celite plug and concentrated to ˜1.5 L which fine particles of a white solid developed. The solution was filtered and concentrated to a thick oil via reduced pressure to produce 239 g of 1-bromo-4-((S)-1-isocyanato-ethyl)-benzene (93.7 wt %, 79.4% yield). 1H-NMR spectroscopy (400 MHz, CD2Cl2) δ 7.53 (d, J=11.4 Hz, 2H), 7.26 (d, J=8.2 Hz, 2H), 4.80 (q, J=6.7 Hz, 1H), 1.59 (d, J=6.7 Hz, 3H). The material was used in Step 3 without further purification. dissolved (homogeneous) The biphasic solution was agitated The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis dried with anhydrous sulfate concentrated to ˜1.5 L which fine particles of a white solid The solution was filtered concentrated to a thick oil via reduced pressure

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 1-chloro-5-methyl-3-phenylhex-5-en-3-ol (2.9 g, 13 mmol), (S)-1-bromo-4-(1-isocyanatoethyl)benzene (3.5 g, 16 mmol), and DBU (8 g, 33 mmol) in THF (80 mL) was heated at reflux overnight. The mixture was diluted with EtOAc, and washed with 1 N aq HCl. The aqueous phase was extracted with EtOAc (3×), and the combined organic phase was dried over Na2SO4. After the solvents were evaporated, the crude product was purified by column chromatography to give (R)-3-((S)-1-(4-bromophenyl)-ethyl)-6-(2-methylallyl)-6-phenyl-1,3-oxazinan-2-one (1.62 g, yield: 30%). was heated at reflux overnight washed with 1 N aq HCl The aqueous phase was extracted with EtOAc (3×) the combined organic phase was dried over Na2SO4 After the solvents were evaporated the crude product was purified by column chromatography

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A mixture of 1-chloro-5-methyl-3-phenylhex-5-en-3-ol (2.9 g, 13 mmol), (S)-1-bromo-4-(1-isocyanatoethyl)benzene (3.5 g, 16 mmol), and DBU (8 g, 33 mmol) in THF (80 mL) was heated at reflux overnight. The mixture was diluted with EtOAc, and washed with 1 N aq HCl. The aqueous phase was extracted with EtOAc (3×), and the combined organic phase was dried over Na2SO4. After the solvents were evaporated, the crude product was purified by column chromatography to give (R)-3-((S)-1-(4-bromophenyl)-ethyl)-6-(2-methylallyl)-6-phenyl-1,3-oxazinan-2-one (1.62 g, yield: 30%). was heated at reflux overnight washed with 1 N aq HCl The aqueous phase was extracted with EtOAc (3×) the combined organic phase was dried over Na2SO4 After the solvents were evaporated the crude product was purified by column chromatography

反应条件: temp:2.51; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a 10 L jacketed reactor was charged 241 g of sodium bicarbonate (2.87 mol, 2.30 equiv) and 5 L of deionized water. The resulting solution was agitated for 10-20 min, until the solids dissolved (homogeneous). To the clear solution was charged 250 g (1.25 mol, 1.00 equiv) of (S)-(−)-1-(4-bromophenyl)ethylamine as a solution in 1.00 L of dichloromethane. An additional 4 L of dichloromethane was charged to the reactor. The biphasic solution was agitated and cooled to Tint=2-3° C. Triphosgene (126 g, 424 mmol, 0.340 equiv) was charged to the reactor in approximately two equal portions ˜6 min apart. It should be noted that a slight exotherm was noted upon the addition of triphosgene. The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis indicates >99 A % conversion (220 nm). The dichloromethane layer was cut and dried with anhydrous sulfate. The resulting solution was passed through a celite plug and concentrated to ˜1.5 L which fine particles of a white solid developed. The solution was filtered and concentrated to a thick oil via reduced pressure to produce 239 g of 1-bromo-4-((S)-1-isocyanato-ethyl)-benzene (93.7 wt %, 79.4% yield). 1H-NMR spectroscopy (400 MHz, CD2Cl2) δ 7.53 (d, J=11.4 Hz, 2 H), 7.26 (d, J=8.2 Hz, 2 H), 4.80 (q, J=6.7 Hz, 1H), 1.59 (d, J=6.7 Hz, 3 H). The material was used in Step 3 without further purification. dissolved (homogeneous) The biphasic solution was agitated The resulting murky solution was agitated at Tint=2-5° C. for 30 min, at which point HPLC analysis dried with anhydrous sulfate concentrated to ˜1.5 L which fine particles of a white solid The solution was filtered concentrated to a thick oil via reduced pressure