作者:Jörg Heerklotz、Anthony Linden、Manfred Hesse
DOI:10.1016/s0040-4020(00)00651-7
日期:2000.9
Two ring enlargement reactions are used to transform the alicyclic 8-membered allyl 2-oxocyclooctane-1-carboxylate (11) to the 13-membered 10-aza-[11]-(2,3)-thiophenophane-1,9-dione (17). The first step yielded the macrocyclic imide allyl N-(3-thienylmethyl)-2,10-dioxo-1-azacyclodecane-3-carboxylate (15) and, after deprotection, N-(3-thienylmethyl)-1-azacyclodecane-2,10-dione (16). In the second step
使用两个环扩大反应将脂环族8元2-氧代环辛烷-1-羧酸烯丙基酯(11)转变为13元10-氮杂-[11]-(2,3)-噻吩基-1,9-二酮(17)。第一步得到大环酰亚胺烯丙基N-(3-噻吩甲基)-2,10-二氧-1-氮杂环癸烷-3-羧酸酯(15),脱保护后得到N-(3-噻吩甲基)-1-氮杂环癸烷-2 ,10-二酮(16)。在第二步骤中,通过使用LDA将N-噻吩基取代基掺入大环中。总产率为45%。该方法还用于转化12-元烯丙基2-氧代环十二烷-1-羧酸酯(20)到17元14-氮杂-[15]-(2,3)-噻吩基-1,13-二酮(23)中。