ChemInform Abstract: Antifertility Agents: A Synthetic Entry to Yuehchukene Analogues. Stereoselective Synthesis of 7,7‐Bis‐nor‐yuehchukene via 9‐Methyl‐6‐oxo‐6aβ‐7,8,10aβ‐tetrahydroindeno(2,1‐b)indole.

Abstract

ChemInform Abstract The alcohol (I), available from indole-3-carbaldehyde, is transformed to the tetracycle (IV) which represents the basic structure of the potent antifertility agent yuehchukene. Compound (IV) is coverted to 7,7-bis-nor-yuehchukene (VIII) via the intermediate benzoate (VI) (space group P1; Z=2).