Synthesis of Pyrido[2,3-d]pyrimidines Catalyzed by 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)/tert-Butyl Nitrite (TBN)/O2
作者:Dongping Cheng、Jing-Hua Li、Xiaoliang Xu、Hongshuang Xia、Huafang Gu、Yawei Wang
DOI:10.1055/a-2156-7470
日期:2023.12
uracils/thiouracil with 1,3-diarylpropenes is disclosed. It undergoes oxidative coupling, intramolecular cyclization, and dehydro-aromatization to provide multi-substituted pyrido[2,3-d]pyrimidines/thiopyrido[2,3-d]pyrimidines in moderate to excellent yields. It has the advantages of high atom economy, green terminal oxidant, and metal-free conditions.