Several synthetic routes to 3-acetonyl- and 3-(2-oxoethyl)glutarates 1–5 have been explored. The most advantageous involves, as the key steps, the conjugate addition of an appropriately substituted vinylmagnesium bromide to an alkylidenemalonic ester, a bis-homologation of the resulting diester and, finally, the reductive ozonolysis of the carbon–carbon double bond. The synthesis can be satisfactorily
几个合成路线3-acetonyl-和3-(2-氧代乙基)
戊二酸酯1 - 5已探索。作为关键步骤,最有利的方法是将适当取代的
乙烯基溴化镁共轭加成至亚烷基
丙二酸酯,所得二酯的双同系物,最后是碳-碳双键的还原性
臭氧分解。合成可以令人满意地以良好的总收率在几克规模上进行。