Lewis acid-catalyzed, high pressure, stereospecific, regiospecific, Diels-Alder cycloaddition of unsubstituted 2-pyrone: Short synthesis of a racemic A-ring precursor to physiologically active 1-hydroxyvitamin D3 steroids - ScienceDirect
摘要：
Bicyclic lactone 1 , a racemic A-ring precursor to diverse physiologically active 1-hydroxyvitamin D 3 analogs, was prepared in 91% yield via 11–12 Kbar, Lewis acid-catalyzed, 4+2-cycloaddition of unsubstituted 2-pyrone.
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关键词：
BETA-HALOGENATED PORPHYRINS PALLADIUM CATALYZED REACTION COUPLING REACTION TERMINAL ACETYLENIC DERIVATIVE
DOI：
10.1016/S0040-4039(00)78339-0
被引量：
年份：
1994
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