and useful synthons for the synthesis of Famvir®, an antiviral drug. Simple methods for the preparation of 2-haloalkylidenemalonates are not available. We have developed a novel and non-cumbersome methodology for the synthesis of dialkyl 2-(2-haloethylidene)malonates, cyanoacetates and halocrotonates by one carbon extension of dialkyl (2-alkoxymethylene)malonates, cyanoacetates and 3-alkoxyacrylates with
2-卤代亚
乙基丙二酸酯是高反应性物种,是用于合成抗病毒药物Famvir®的有用合成子。没有制备2-卤代亚烷基
丙二酸酯的简单方法。我们已经开发了一种新颖且不麻烦的方法,该方法通过二甲基(2-烷氧基亚甲基)
丙二酸酯,
氰基
乙酸酯和3-烷氧基
丙烯酸酯与一个
二甲基亚砜基的碳原子延伸来合成2-(2-卤代亚乙基)
丙二酸二烷基酯,
氰基
乙酸酯和卤代
巴豆酸酯。