The first example of intramolecular cycloaddition of carbene-derived azomethine ylides in a domino reaction of difluorocarbene with Schiff bases
作者:Mikhail S Novikov、Alexander F Khlebnikov、Olga V Besedina、Rafael R Kostikov
DOI:10.1016/s0040-4039(00)02105-5
日期:2001.1
Domino reactions of difluorocarbene with Schiff bases containing a tethered olefinic or acetylenic dipolarophile moiety involve intramolecular 1,3-dipolar cycloaddition of iminiodifluoromethanides and yield chromeno[4,3-b]pyrrole derivatives.
二氟卡宾与含有连接的烯烃或炔属双极性亲和性基团的席夫碱的多米诺反应涉及亚氨基二氟甲烷的分子内1,3-偶极环加成反应,并生成苯并[4,3- b ]吡咯衍生物。
Intramolecular 1,3-Dipolar Cycloaddition of Geminal Difluoro Azomethine Ylides at Multiple Carbon-Carbon Bonds
作者:M. S. Novikov、A. F. Khlebnikov、I. V. Voznyi、O. V. Besedina、R. R. Kostikov
DOI:10.1007/s11178-005-0171-5
日期:2005.3
N-Alkyl- and N-arylimines derived from o-allyl-, o-allyloxy-, and o-(2-propynyloxy)arenecarbaldehydes react with difluorocarbene to give indeno[1,2-b]pyrrole and chromeno[4,3-b]pyrrole derivatives. The reaction involves intermediate formation of difluoro-substituted azomethine ylides which undergo regio- and stereoselective intramolecular ring closure at the multiple bond.