Tetrahedron

Ba (OH) 2 as catalyst in organic reactions: Part XIX-Structure-catalytic activity relationship in the AdN of several ylids to CH= O group, catalyzed by activated barium …

JV Sinisterra, JM Marinas, F Riquelme, MS Arias

文献索引：Sinisterra, J. V.; Marinas, J. M.; Riquelme, F.; Arias, M. S. Tetrahedron, 1988 , vol. 44, # 5 p. 1431 - 1440

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被引用次数: 15

摘要

The reactivity of several products R1R2CH-X+, 1,(X= N, P, S), which can produce ylids by reaction with bases, has been tested using the activated barium hydroxide catalysts, C-200. Wittig-Horner, Wittig, Corey-Chaykovsky and Kröhnke type reactions have been analyzed. The pKa of 1, and the structure of active sites control the process. When 1 has a strong acid character, the process takes place-dissolving the solid-in homogeneous phase. When 1, ...