Applying an Aza-Wittig Reaction for the Synthesis of Novel Thieno[3′,2′:5,6] Pyrido[4,3-<i>d</i>]pyrimidinone Derivatives
作者:Jian-Chao Liu、Hong-Wu He
DOI:10.1080/10426500802101109
日期:2008.12.23
A series of new 2-substituted tetrahydrobenzo[4′,5′]thieno[3′,2′:5,6]pyrido[4,3-d] pyrimidin-4(3H)-ones 5 has been designed and synthesized via an aza-Wittig reaction. Iminophosphorane 3a or iminophosphorane 3b reacted with 4-Cl-phenyl(or 4-F-phenyl) isocyanate to give carbodiimide 4a or carbodiimide 4b , which were further treated with phenols to cyclize to give compounds 5 in presence of a catalytic
设计并合成了一系列新的2-取代四氢苯并[4',5']噻吩并[3',2':5,6]吡啶并[4,3-d]嘧啶-4(3H)-ones 5氮杂-维蒂希反应。亚氨基正膦 3a 或亚氨基正膦 3b 与 4-Cl-苯基(或 4-F-苯基)异氰酸酯反应得到碳化二亚胺 4a 或碳化二亚胺 4b ,在催化量的 K2CO3 存在下,进一步用酚类处理环化得到化合物 5。化合物5的结构已通过1H NMR、EI-MS、IR光谱和元素分析得到证实。