Improved Syntheses of 3,17β-Diacetoxyestra-1,3,5(10)-Trien-6-One

Abstract
Improved syntheses of 3,17β-Diacetoxyestra-1,3,5(10)-trien-6-one 5 was achieved in 4 steps (respectively in 45% and 56% overall yield) from 19-nortestosterone 1.