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Species and strain differences in the epimerization of 3β, 17β-dihydroxy-17α-ethynyI-Δ5(10)-estrene to the 3α-hydroxy epimer

✍ Scribed by Ralph I. Freudenthal; Roni Rosenfeld; Monroe E. Wall

Book ID
115770810
Publisher
Elsevier Science
Year
1971
Tongue
English
Weight
317 KB
Volume
20
Category
Article
ISSN
0006-2952

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CH,(18) + 14-CH3; 2.07, s CH,( 4) (CDCI,);not yet crystalli~ed]~). Finally, 8 was converted by catalytic hydrogenation [5%-Pd/C in ethanol/triethylamine; + 11 and cyclisation [HCl in acetic acid] into 3-oxo-17~-acetoxy-14a-methyl-A4-8a,9B,lOa,13a-estrene (12) [m.p. 86-88'; -[ U ] D = + 1' (CHC1,).