Pyrrolodiazines. 2. Structure and Chemistry of Pyrrolo[1,2-<i>a</i>]pyrazine and 1,3-Dipolar Cycloaddition of Its Azomethine Ylides
作者:José M. Mínguez、María I. Castellote、Juan J. Vaquero、José L. García-Navio、Julio Alvarez-Builla、Obis Castaño、José L. Andrés
DOI:10.1021/jo9600969
日期:1996.1.1
2-a]pyrazine system from pyrrole is described. In light of the ab initio calculations carried out on this heterocyclic system some of its basic chemistry was investigated and included electrophilic substitution, addition of organolithium reagents, metalation with lithium diisopropylamide and subsequent reaction with electrophiles, and formation of salts by quaternization of the nonbridgehead nitrogen. N-ylides
描述了由吡咯合成吡咯并[1,2-a]吡嗪系统。根据对该杂环系统进行的从头算计算,研究了该化合物的一些基本化学性质,包括亲电取代,有机锂试剂的添加,二异丙基氨基锂的金属化以及随后与亲电的反应,以及通过非桥头氮的季铵化形成盐。从这些盐中获得的N-基化物与合适的双极性亲和剂进行1,3-偶极环加成反应,生成双吡咯并[1,2-a]吡嗪,吡唑并[1,5-a]-吡咯并[2,1-c]吡嗪和异甜菜碱。 。还报道了分子内1,3-偶极环加成的实例。