α-Substitution of β-Thienylcarbamates: Alkylation, Vinylation and Pd-Catalyzed Coupling Reactions
作者:Delphine Brugier、Francis Outurquin、Claude Paulmier
DOI:10.1016/s0040-4020(00)00173-3
日期:2000.5
Acid catalyzed α-alkylation of 4, using α-branched or functionalized aldehydes, has allowed the synthesis of divinylthiophenes 13 and thieno[3,2–b]pyridines 14–16, respectively. Pd-catalyzed coupling reactions involving halo- or dihalothienylcarbamates 10, 17, 18 were studied. One or two alkenyl, alkynyl, aryl groups were introduced on the thiophene nucleus.
的trilithio衍生物的反应二-吨-丁基噻吩-3,4- diyldicarbamate 4与烷基卤化物已经导致2- alkylthiophenedicarbamates 9和11和4- alkylthieno [3,4-d]咪唑酮12。酸催化的α-烷基化4,使用α-支化或官能化的醛,已经允许divinylthiophenes的合成13和噻吩并[3,2-B]吡啶14 - 16,分别。Pd催化的偶联涉及卤代反应或dihalothienylcarbamates 10,17,18被研究了。在噻吩核上引入一个或两个烯基,炔基,芳基。