Organomanganese (II) reagents XVII. Preparation of organomanganese bromide compounds in ether: An efficient and economic alternative to organomanganese iodide compounds for synthetic applications
作者:Gérard Cahiez、Blandine Laboue
DOI:10.1016/s0040-4039(00)99435-8
日期:1989.1
Organomanganese bromide reagents have been prepared in high yields in ether from organomagnesium or organolithium compounds and manganese bromide. The preparation must be performed in the presence of lithium bromide which allows to dissolve the manganese bromide in ether. Organomanganese bromide reagents react quite similarly to their iodide analogous. For synthetic applications they present the advantage
We found that the combination of [Ir(cod)Cl]2 and rac-BINAP served as an efficient catalyst for the [2+2+2] cycloaddition of 2,7-nonadiyne derivatives and related compounds with alkynyl ketones and alkynyl esters. The corresponding products were obtained in high yields under mild reaction conditions.