The marine antineoplastic agent aplysistatin (6) has been prepared enantiospecifically. The key step is the biomimetic cyclization of (2R, 3R)-2-homogeranyl-3,4-dihydroxybutanoic acid 1 4 lactone (3)_with 2,4,4,6-tetrabromocyclohexa-2,5-dienone in nitromethane.
已经对映体制备了海洋
抗肿瘤药aplysistatin(6)。关键步骤是将(2R,3R)-2-hogergeranyl-3,4-dihydroxybutanoic acid 1 4内酯(3)与2,4,4,6-四
溴环己-2,5-二烯酮在
硝基甲烷中进行仿生环化。