1,4-Disubstituted and 1,4,5-Trisubstituted 2-[(Benzotriazol-1-yl)methyl]pyrroles as Versatile Synthetic Intermediates
作者:Alan R. Katritzky、Jianqing Li
DOI:10.1021/jo951894m
日期:1996.1.1
well as nucleophilic substitutions to give pyrroles of type pyrrolyl-2-CHENu. Thus, 1,4-disubstituted (7) and 1,4,5-trisubstituted 2-[(benzotriazol-1-yl)methyl]pyrroles (15) were easily prepared from the reaction of 5-(benzotriazol-1-yl)-1,2-epoxy-3-pentynes 4 or 14 with primary amines in i-PrOH. The 2-(benzotriazol-1-yl)methyl side chains of compounds 7 and 15 were elaborated by nucleophilic substitution
与以前使用的CH(2)X取代基不同,CH(2)Bt取代基使(i)合成具有未取代环位置的吡咯和(ii)亲电和亲核取代产生吡咯基-2-型吡咯陈努 因此,由5-(苯并三唑-1-基)的反应容易地制备1,4-二取代的(7)和1,4,5-三取代的2-[((苯并三唑-1-基)甲基]吡咯(15)。 -1,2-环氧-3-戊炔4或14与伯胺在i-PrOH中。化合物7和15的2-(苯并三唑-1-基)甲基侧链通过亲核取代以及通过初始烷基化,然后取代或消除苯并三唑基部分进行精细修饰,得到各种1,2,4-三取代( 6,8-9,11-13)和1,2,4,5-四取代的吡咯(18,20-22)。