Steroids and related natural products. LIV. Bufadienolides. 7. Synthesis of 3. beta.-acetoxy-5. alpha.-l4. alpha.-bufa-20, 22-dienolide

GR Pettit, DC Fessler, KD Paull, P Hofer…

Index: Pettit,G.R. et al. Journal of Organic Chemistry, 1970 , vol. 35, p. 1398 - 1404

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Citation Number: 27

Abstract

(14) Some controversy over the furan-like ion structure has been raised: WH Pirkle and M. Dines, J. Amer. Chem. Soc., SO, 2318 (1968). We wish to thank Professor P. Brown for a very helpful discussion of the mass spectrum of pyrone 6. 166) fragmentation. Formation of the benzylic-type ion (m/e 109) is a transformation characteristic of alkylbenzenes, 16 and as with alkylbensenes containing side chains longer than propyl, the 0 cleavage was ...