Novel Solid-phase and Solution-phase Synthetic Methods for Trisubstituted Thieno[3,2-<i>d</i>]pyrimidine Derivatives
作者:Moon-Kook Jeon、Jung-Gyu Kim、Duck-Hyung Lee
DOI:10.1002/bkcs.10878
日期:2016.9
solution‐phase surrogates. Additionally, N‐acylation (acid chloride, InF3 , CH3CN, room temperature) and cyclization (DBN, 1,4‐dioxane, 80°C) of a 3‐amino‐4‐(4‐t‐butoxycarbonylphenyl)thiophene‐2‐carboxamide intermediate under previously unreported conditions provided 2‐substituted thieno[3,2‐d]pyrimidin‐4(3H)‐one derivatives, which were subsequently converted to 2‐substituted 4‐alkylamino‐7‐[4‐(alkylaminocarbonyl)phenyl]thieno[3
7-芳基-3,4-二氢-4-氧噻吩并[3,2- d ]嘧啶-2-羧酸与烷基胺负载的酸敏感的甲氧基苯甲醛(AMEBA)树脂(苯并三唑-1-酯)的偶联六氟磷酸基氧基三(二甲氨基)phosph (BOP)介导的胺化反应,并从固相支持物上裂解,得到N-烷基-4-(烷基氨基)-7-芳基硫代[3,2 - d ]嘧啶-2-羧酰胺衍生物。通过衰减全反射-FTIR光谱监测固相反应的进程,并将其与代表性的溶液相替代物进行比较。此外,N-酰化(酰氯,InF 3,CH 3CN,室温)和3-氨基-4-(4-叔丁氧基羰基苯基)噻吩-2-羧酰胺中间体在以前未报告的条件下的环化(DBN,1,4-二恶烷,80°C)提供了2-取代的硫代诺[3,2 - d ]嘧啶-4(3 H)-one衍生物,随后将其转化为2-取代的4-烷基氨基-7- [4-(烷基氨基羰基)苯基]噻吩并[3,2- d ]嘧啶衍生物通过由BOP介导的胺化反应,叔丁基脱保护和酰胺形成组成的反应顺序。