Synthesis of pyrimido[4,5-b]indoles and benzo[4,5]furo[2,3-d]pyrimidines via palladium-catalyzed intramolecular arylation
作者:Yue-Mei Zhang、Thomas Razler、Paul F. Jackson
DOI:10.1016/s0040-4039(02)02036-1
日期:2002.11
Various pyrimido[4,5-b]indoles and benzo[4,5]furo[2,3-d]pyrimidines were synthesized via a palladium-catalyzed intramolecular arylation of pyrimidine substrates. Thus, 4-aryloxy- or 4-anilino-5-iodopyrimidines were treated with Pd(OAc)2(PPh3)2 and base in DMF to give the regioselective cyclized heterocycles.
通过嘧啶底物的钯催化分子内芳基化反应合成了各种嘧啶并[4,5- b ]吲哚和苯并[4,5]呋喃[2,3- d ]嘧啶。因此,用Pd(OAc)2(PPh 3)2和在DMF中的碱处理4-芳氧基-或4-苯胺基-5-碘嘧啶,得到区域选择性环化的杂环。