Asymmetric cyclizations of methyl (E)-3-oxo-9-phenoxy-7-nonenoate () or methyl (E)-3-oxo-9-(methoxycarbonyl)oxy-7-nonenoate () without added base were carried out in the presence of a catalytic amount of palladium(II) acetate and chiral diphosphine as ligands. Allylic carbonate reacted by use of Pd(OAC)2-(S)-(R)-BPPFA at room temperature to give (R)-3-vinylcyclohexanone (), after decarboxylation, in
甲基的不对称环化(ê)-3-氧代-9-苯氧基-7-
壬烯酸异
丙酯()或甲基(Ë)-3-氧代-9-(甲氧基羰基)氧基-7-
壬烯酸异
丙酯(),而不添加碱进行中进行催化量的
乙酸钯(II)和手性
二膦作为
配体的存在。
碳酸烯
丙酯在室温下通过使用Pd(OAC)2-(S)-(R)-
BPPFA反应生成(R)-3-
乙烯基环己酮(),脱羧后最多可得到48%ee