Reactivity of differentially substituted bis(diazo) esters in rhodium(II) mediated O-H insertion reactions
作者:Christopher J. Moody、David J. Miller
DOI:10.1016/s0040-4020(97)10435-5
日期:1998.3
bis(diazo) compounds was prepared in which the two diazo groups are differentially substituted. Rhodium(II) acetate catalysed decomposition in the presence of methanol resulted in exclusive O-H insertion reaction at the more reactive diazo group, the less reactive diazophosphonate remaining intact. With the more active rhodium(II) trifluoroacetamide as catalyst, both diazo groups decomposed simultaneously
讨论了一个重氮基团在另一重氮基团的存在下的选择性催化分解。制备了一系列的双(重氮)化合物,其中两个重氮基被不同地取代。在甲醇存在下乙酸铑(II)催化的分解导致在反应性较高的重氮基团处发生独家的OH插入反应,反应性较低的重氮膦酸酯保持完整。用更具活性的三氟乙酰胺铑(II)作为催化剂,两个重氮基团同时分解。