Synthesis of structurally diverse benzimidazolyl benzimidazolones by application of soluble polymer support
作者:Hsia-Yuan Chen、Manohar V. Kulkarni、Chih-Hau Chen、Chung-Ming Sun
DOI:10.1016/j.tet.2008.04.081
日期:2008.6
Chemical stability and reactivity of a bifunctional polymer conjugate containing an ortho-amino arylamide linkage have been successfully exploited to achieve a parallel synthesis of methoxycarbonylated head–tail bis-benzimidazoles. Regioselective alkylation of the two nitrogens in the benzimidazolone moiety has been carried out by ipso-fluoro displacement, and N-alkylation to generate two diversities
已经成功地利用了包含邻氨基氨基酰胺键的双功能聚合物共轭物的化学稳定性和反应活性,以实现甲氧羰基化的首尾双苯并咪唑的平行合成。苯并咪唑酮酮部分中的两个氮的区域选择性烷基化通过ipso-氟置换和N-烷基化进行,以产生两个多样性。聚合物载体的裂解产生了高纯度和高收率的二取代和三取代的苯并咪唑基苯并咪唑酮的两个文库。通过1 H NMR直接在载体上监测所有反应步骤。