Issue 3, 1992

Lewis acid-mediated isomerisation of (25R)-3β-acetoxy-5α-spirostan-23-one, a C-22 spiroacetal: an approach to the synthesis of C-23 spiroacetal steroidal sapogenins

Abstract

Treatment of (25R)-3β-acetoxy-5α-spirostan-23-one (23-oxo-tigogenin acetate)3 with titanium tetrachloride afforded the 22-oxo-23-spiroacetal isomer 4 in excellent yield.

Article information

Article type
Paper

J. Chem. Soc., Chem. Commun., 1992, 275-277

Lewis acid-mediated isomerisation of (25R)-3β-acetoxy-5α-spirostan-23-one, a C-22 spiroacetal: an approach to the synthesis of C-23 spiroacetal steroidal sapogenins

R. Hernández, J. J. Marrero-Tellado, K. Prout and E. Suáez, J. Chem. Soc., Chem. Commun., 1992, 275 DOI: 10.1039/C39920000275

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