反应详情

A solution of 21-chloro-17-hydroxy-16α-(2-oxopropoxy)pregna-1,4,9(11)-triene-3,20-dione (4mmoles) and 7.2 g of lithium chloride in 72 ml of glacial acetic acid is stirred at 0°-5°C and 592 mg of N-chlorosuccinimide is added. A solution of 180 mg of dry hydrogen chloride in 2.9 ml of tetrahydrofuran is added and the resulting mixture stirred at room temperature for 2 hours, poured into 400 ml of cold water, and extracted with chloroform. The chloroform solution is washed with water, dried, and evaporated to give the title compound.

1. extractionextracted with chloroform
2. washThe chloroform solution is washed with water
3. customdried
4. customevaporated