反応 #449275

反応方程式

diphenylphosphoryl chloride

diisopropylethylamine

4-nitrobenzyl (1R,5R,6S)-6-[(1R)-1-hydroxyethyl]-1-methyl-2-oxo-1-carbapenam-3-carboxylate

diisoproylethylamine

(2S,4S)-4-mercapto-2-[(3S)-3-(1-1,2,4-triazolyl)-1-pyrrolidinylcarbonyl]-1-(4-nitrobenzyloxycarbonyl)pyrrolidine

→

title compound

収率 70.1%

4-Nitrobenzyl (1R,5S,6S)-6-[(1R)-1-hydroxyethyl]-1-methyl-2-[(2S,4S)-1-(4-nitrobenzyloxycarbonyl)-2-[(3S)-3-(1-1,2,4-triazolyl)-1-pyrrolidinylcarbonyl]pyrrolidin-4-ylthio]-1-carbapen-2-em-3-carboxylate

収率 70.1%

溶媒

acetonitrile

acetonitrile

反応条件

後処理

1. 1
   温度cooling, to the resulting solution
2. 2
   温度cooling, to the resulting mixture
3. 3
   workup.STIRRINGthe mixture was stirred at the same temperature for 6 hours
4. 4
   その他The solvent was then removed by distillation under reduced pressure
5. 5
   workup.DISSOLUTIONthe resulting residue was dissolved in ethyl acetate
6. 6
   洗浄The resulting solution was then washed with water, with an aqueous solution of sodium hydrogencarbonate, again with water and finally with a saturated aqueous solution of sodium chloride
7. 7
   抽出The aqueous layer was extracted with methylene chloride
8. 8
   乾燥dried over anhydrous magnesium sulfate
9. 9
   その他The solvent was removed by distillation under reduced pressure
10. 10
    その他the residue was purified by silica gel column chromatography
11. 11
    workup.ADDITIONby volume mixture of ethyl acetate and methanol as the eluent

実験手順

486 mg of 4-nitrobenzyl (1R,5R,6S)-6-[(1R)-1-hydroxyethyl]-1-methyl-2-oxo-1-carbapenam-3-carboxylate were dissolved in 5 ml of dry acetonitrile, and 379 mg of diphenylphosphoryl chloride and 182 mg of diisopropylethylamine were added dropwise, with ice-cooling, to the resulting solution. The mixture was then stirred at the same temperature for 1 hour. At the end of this time, a solution of 173 mg of diisoproylethylamine and 690 mg of (2S,4S)-4-mercapto-2-[(3S)-3-(1-1,2,4-triazolyl)-1-pyrrolidinylcarbonyl]-1-(4-nitrobenzyloxycarbonyl)pyrrolidine (prepared as described in Preparation 119) in 4 ml of dry acetonitrile was added dropwise with ice-cooling, to the resulting mixture, and the mixture was stirred at the same temperature for 6 hours. The solvent was then removed by distillation under reduced pressure, and the resulting residue was dissolved in ethyl acetate. The resulting solution was then washed with water, with an aqueous solution of sodium hydrogencarbonate, again with water and finally with a saturated aqueous solution of sodium chloride. The aqueous layer was extracted with methylene chloride, and the aqueous layer was combined with the washings and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure, and the residue was purified by silica gel column chromatography, using a 5:1 by volume mixture of ethyl acetate and methanol as the eluent, to obtain 744 mg of the title compound, as a powder.

出典