反应详情

To a solution of ethyl P-methyl-2-nitro-5-chlorophenylphosphinate (20.0 mmol) and ethanethiol (60.0 mmol) in dimethylsulfoxide (20 ml) is added a solution of sodium hydroxide (40.0 mmol) in 1 ml of water. The mixture is warmed to 60° overnight, after which it is poured into water and extracted with ether. The aqueous solution is acidified, extracted with methylene chloride, dried and evaporated to give P-methyl-2-nitro-5-ethylthiophenylphosphinic acid, which is then treated with diazomethane in methanol to give methyl P-methyl-2-nitro-5-ethylthiophenylphosphinate.

1. temperatureThe mixture is warmed to 60° overnight
2. extractionextracted with ether
3. extractionextracted with methylene chloride
4. customdried
5. customevaporated