作者:Alan B. Levy、Steven J. Schwartz、Nancy Wilson、Bradley Christie
DOI:10.1016/s0022-328x(00)84870-6
日期:1978.8
Several alkenyltrialkylborate salts derived from the reaction of α-methoxyvinyllithium (MVL) with trialkylboranes have been prepared. At −80°C, the initial complex is stable as indicated by its iodination to give moderate yields of enol ethers. Warming the complex to room temperature leads via an alkyl group migration to a new alkenyldialkylmethoxyborate salt. Oxidation of this complex leads to methyl
已经制备了几种衍生自α-甲氧基乙烯基锂(MVL)与三烷基硼烷的反应的烯基三烷基硼酸盐。初始络合物在-80°C下稳定,如其碘化所示,得到适量的烯醇醚。将络合物温热至室温导致经由烷基迁移至新的烯基二烷基甲氧基硼酸盐。该络合物的氧化产生甲基酮。或者,在氧化之前用各种亲电试剂,例如酸,碘或烷基化剂处理该盐,分别导致甲基二烷基甲醇,1,1-二烷基乙烯和受阻叔醇。可以通过亲电攻击烯基硼酸盐的β碳来合理化产物。这些盐的显着亲核性似乎可以与烯胺类相媲美。