Michael addition approach for the synthesis of novel spiro compounds and 2-substituted malonic acid derivatives from Meldrum’s acid
作者:Madhukar S. Chande、Rahul R. Khanwelkar
DOI:10.1016/j.tetlet.2005.09.030
日期:2005.11
Novel routes for the synthesis of spiro derivatives of Meldrum’s acid and 2-substituted malonic acid derivatives have been developed. Meldrum’s acid was monoalkylated using a Michael addition reaction. Mono-Michael adducts were then alkylated using substituted haloalkanes, which on condensation gave spiro derivatives of Meldrum’s acid. Bis Michael addition of Meldrum’s acid with 1,5-diaryl-1,4-pentadien-3-one
已经开发了用于合成Meldrum的酸和2-取代的丙二酸衍生物的螺环衍生物的新途径。使用迈克尔加成反应将麦德鲁姆酸单烷基化。然后使用取代的卤代烷烃将单迈克尔加成物烷基化,该缩合的卤代烷烃在缩合后产生麦德鲁姆酸的螺环衍生物。Meldrum酸与1,5-二芳基-1,4-pentadien-3-one的Bis Michael加成直接得到Meldrum酸的螺环衍生物。这些化合物和双烷基化的麦德鲁姆酸衍生物,在酸性甲醇分解作用下,得到2-取代的丙二酸。