作者:S. Richard Baker、Andrew F. Parsons、Michelle Wilson
DOI:10.1016/s0040-4039(98)00254-8
日期:1998.4
The Bu3SnH mediated cyclisation of a serine-derived dehydroalanine was shown to provide an efficient approach to a protected 4-phenylpyroglutamate which was elaborated to 4-phenylglutamic acid in good yield. Cyclisation reactions of this type were shown to proceed via an intermediate captodative radical which could be trapped intermolecularly using an alkene e.g. styrene or methyl methacrylate. This
已表明,Bu 3 SnH介导的丝氨酸衍生的脱氢丙氨酸的环化提供了一种有效的方法来保护被保护的4-苯基焦谷氨酸,其被精制成4-苯基谷氨酸,产率很高。已表明这种类型的环化反应是通过一个中间的封端性基团进行的,该基团可以使用烯烃例如苯乙烯或甲基丙烯酸甲酯被分子间捕获。该方法具有合成各种4-和/或2-取代的谷氨酸的潜力。