GENERAL CONJUGATE-ADDITION METHOD FOR THE SYNTHESIS OF ENANTIOMERICALLY PURE LIGNANS - TOTAL SYNTHESIS OF (-)- AND (+)-BURSERAN, (-)-DEHYDROXYCUBEBIN, (-)-TRICHOSTIN, (-)-CUBEBIN, (-)-5''-METHOXYHINOKININ, AND (-)-HINOKININ

被引:55
作者
REHNBERG, N [1 ]
MAGNUSSON, G [1 ]
机构
[1] UNIV LUND, LUND INST TECHNOL, CTR CHEM, BOX 124, S-22100 LUND, SWEDEN
关键词
D O I
10.1021/jo00301a026
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Conjugate addition of benzylic diphenyldithioacetal anions to enantiomerically pure (-)-(2i?)- and (+)-(2S)-2-(benzyloxy)-2,5-dihydro-4-[3,4-(methylenedioxy)benzoyl]furan (2r and 2s) gave complete lignan skeletons of the dibenzylbutane class. Desulfurization followed by hydrogenolysis and, when appropriate, oxidation gave the title enantiomerically pure (>99% ee) lignans 45–50 in 24-35% overall yields from 2r and 2s. © 1990, American Chemical Society. All rights reserved.
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页码:4340 / 4349
页数:10
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