The Pd/C–CuI–PPh3 catalytic system facilitated C–C bond formation between 4-chlorothieno[2,3-d]pyrimidines and terminal alkynes in methanol with high selectivity without generating any significant side products arising from C–O bond formation between the chloro compounds and methanol. A variety of novel 4-alkynylthieno[2,3- d]pyrimidines were prepared via alkynylation of 4-chlorothieno[2,3-d]pyrimidines in good to excellent yields. Some of the compounds synthesized were tested for cytotoxic activity in vitro.
Pd/C–CuI–PPh3催化系统促进了4-氯噻吩[2,3-d]嘧啶与末端炔烃在甲醇中高选择性地形成C-C键,而不生成任何由氯化合物与甲醇之间的C-O键形成产生的显着副产物。通过4-氯噻吩[2,3-d]嘧啶的炔基化制备了多种新型4-炔基噻吩[2,3-d]嘧啶,收率为良好至优异。一些合成的化合物在体外进行了细胞毒性活性测试。