Regioselective Synthesis of Some New Pyrazolo[1,5-<i>a</i>]pyrimidines, Pyrazolo[1,5-<i>a</i>]quinazoline and Pyrimido[4′,5′:3,4]pyrazolo[1,5-<i>a</i>] pyrimidines Containing Thiazole Moiety
作者:Samir Bondock、Abd El-Gaber Tarhoni、Ahmed A. Fadda
DOI:10.1002/jhet.2278
日期:2015.11
A regioselective synthesis of novel pyrazolo[1,5‐a]pyrimidines, pyrazolo[1,5‐a]quinazoline and pyrimido[4′,5′:3,4]pyrazolo[1,5‐a]pyrimidines incorporating a thiazole moiety was described via the reactions of the versatile, readily accessible 5‐amino‐3‐(phenylamino)‐N‐(4‐phenylthiazol‐2‐yl)‐1H‐pyrazole‐4‐carboxamide 3 with appropriate 1,3‐biselectrophilic reagents namely, β‐diketones, enaminones, and
区域选择性合成新型吡唑并[1,5- a ]嘧啶,吡唑并[1,5- a ]喹唑啉和嘧啶并[4',5':3,4]吡唑并[1,5- a ]嘧啶并入噻唑部分通过多功能的,易于获得的5-氨基-3-(苯基氨基)-N-(4-苯基噻唑-2-基)-1H-吡唑-4-羧酰胺3与适当的1,3-双亲电子试剂的反应进行了描述即,β-二酮,烯胺酮和α,β-不饱和环酮。尽可能通过元素分析,光谱数据和替代合成路线来阐明新合成的化合物。