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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

AuthorsHernández, Rosendo ; Marrero-Tellado, José Juan ; Prout, Keith; Suárez, Ernesto
Issue Date1992
PublisherRoyal Society of Chemistry (UK)
CitationChemical Communications 1992(3): 275-277 (1992)
AbstractTreatment 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.
Description3 pages, 1 figure, 2 schemes.
Publisher version (URL)http://dx.doi.org/10.1039/C39920000275
Appears in Collections:(IPNA) Artículos
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