Process for producing 3 - oxo - 4 - pregn eno - 21, 17 carbolactonas oxidation by metal free 17 - (3-hydroxypropyl) - 3:17 - dihicroxiandrostanos

摘要

This Invention relates to processes for producing 3 - oxo - - carbolactonas pregnane 21:17 formula II, as well as 3 - 4 - oxo - pregn eno - 21, 17 - carbolactonas formula III oxidation by metal free 17 - (3-hydroxypropyl) - 3:17 - dihidroxiandrostanos formula I, The Invention relates hemiso Lvato in dichloromethane (6b, 7b; 14B, 16b dimetileno - 3 - oxo - 17th - pregnan - 5b - ol - 2117 - carbolactona (iv) as well as a process for producing Drospirenone