Journal of Organic Chemistry p. 4340 - 4349 (1990)
Update date:2022-07-30
Topics:
Rehnberg, Nicola
Magnusson, Goeran
Conjugate addition of benzylic diphenyldithioacetal anions to enantiomerically pure (-)-(2R)-and (+)-(2S)-(benzyloxy)-2,5-dihydro-4-<3,4-(methylenedioxy)benzoyl>furan (2 r and 2 s) gave complete lignan skeletons of the dibenzylbutane class.Desulfurization followed by hydrogenolysis and, when appropriate, oxidation gave the title enantiomerically pure > 99 percent ee) lignans 45 - 50 in 24 - 35 percent overall yields from 2 r and 2 s.
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