A stable methyleneketene and the stepwise fragmentation of Meldrum's acids
作者:Primoz Lorenčak、J. C. Pommelet、Josselin Chuche、Curt Wentrup
DOI:10.1039/c39860000369
日期:——
Mild Flash vacuum pyrolysis of the Meldrum'sacid derivative (3) gives the first example of a methylenemalonic anhydride (4), which decarboxylates in solution to give the first isolable methyleneketene (5); the structures are supported by 13C n.m.r. spectra and chemical reactions.
迈德鲁姆酸衍生物(3)的轻度闪蒸真空热解给出了亚甲基丙二酸酐(4)的第一个例子,该亚甲基丙二酸酐在溶液中脱羧得到了第一个可分离的亚甲基乙烯酮(5)。这些结构由13 C nmr光谱和化学反应支持。