Ak. Gupta et al., SYNTHESIS OF D-RING FUNCTIONALIZED AND D-BENZO HETERO-ANNULATED ESTRONE DERIVATIVES VIA ALPHA-OXOKETENE DITHIOACETAL, Synthesis, (7), 1995, pp. 841-844
Synthesis and chemical transformation of the alpha-oxoketene dithioace
tal, derived from estrone methyl ether, leading to new D-ring function
alized (4 and 6), D-benzo- (8), D-naphtho- (10 and 11) and D-hetero-an
nulated (12-14) derivatives are described.