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- W2035601654 startingPage "1582" @default.
- W2035601654 abstract "Synthesis of 3a-methylene-3β, 5β-ethano-B-nor-5β-androstane 6β-carboxylic acid (1) having a gibbane B-C-D ring system is described. 5β-Cyano-6β-vinyl-B-nor-5β-androstan-3-one (5), the starting material, was transfomed stereoselectively to 3α-tosyloxy-5β-(trans-β-formyl) vinyl-6β-vinyl-5β-androstane (22d), the key intermediate, by theeight-step synthesis. The latter, after selective ozonization was subjected to a newcyclization method involving Participation of 6β-hemiacetal function to afford 3β, 5β-etheno derivative (38), which on subsequent oxidation and the Wolff-Kishner reduction, led to the desired compound (1). Some attempted experiments for homologation atthe 5β-nitrile function are also described." @default.
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- W2035601654 date "1971-01-01" @default.
- W2035601654 modified "2023-10-09" @default.
- W2035601654 title "Synthesis of Bridged Steroids. VII. B-Norsteroids having a Gibbane B-C-D Ring System.(2). Synthesis of the 7-Deoxygibberellin Type Ring System" @default.
- W2035601654 doi "https://doi.org/10.1248/cpb.19.1582" @default.
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