A new procedure for the in situ generation of methylene ketenes

AP Masters, TS Sorensen…

文献索引：Masters, Andrew P.; Sorensen, Ted S.; Tran, Phu Mahn Canadian Journal of Chemistry, 1987 , vol. 65, p. 1499 - 1502

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被引用次数: 8

摘要

The reaction of pentacarbonylmanganate anion 3 and 2-bromopropenoyl chlorides 2 leads to 2, 4-alkylidenecyclobutane-1, 3-diones 5. The latter are formed from dimerization of the corresponding methylene ketenes 1 so that the reaction of 2 and 3 constitutes a new synthetic procedure for the in situ generation of these very reactive intermediates. Acid chlorides 2 are readily available from α, β-unsaturated acids via bromination- ...