Preparation of a 24-Nor-1, 4-dien-3-one Triterpene Derivative from Betulin: A New Route to 24-Nortriterpene Analogues1

Y Deng, JK Snyder

Index: Nowitzki, Olaf; Muennich, Ira; Stucke, Holger; Hoffmann Tetrahedron, 1996 , vol. 52, # 36 p. 11799 - 11810

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Citation Number: 44

Abstract

... Volume: Page ... base, LTMP, and proton sponge) to form the kinetic enolate, followed by oxidation with 2-(phenylsulfonyl)-3-phenyloxaziridine 36,41 or ... was finally achieved with benzeneseleninic anhydride/KO t Bu 42 to produce the desired 23 in 52% yield (with ...