126772-11-0Relevant articles and documents
Steroid compounds
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, (2008/06/13)
Steroid compounds of the following general formulas (I), (II) and (III) are provided: STR1 In the above formulas, R1 and R2 each is a hydrogen atom or a hydroxyl-protecting group, R is a group of the formula --CH2 --X (in which X is a substituent such as a hydroxyl group), a carboxyl group or a protected carboxyl group, A1 is an aryl group, a lower alkyl group or an aralkyl group, and Z1, Z2, Z3 and Z4 each is a hydrogen atom, a hydroxyl group or a protected hydroxyl group. The above steroid compounds are useful as intermediates for the synthesis of vitamin D3 derivatives having a hydroxyl group at the 1α-position.