摘要/Abstract
碱存在下，1-重氮-2，4-二羰基-5-炔基膦酸酯的环化提供新颖的3-膦酰基吡喃骈[3，2-c]吡唑-7-（1H）-酮衍生物，产率48%~99%.这种方法最显著的特点是反应条件温和，操作简单以及对不同底物具有优良的普适性.
关键词: 合成, 碱, 环化, 吡喃骈[3,2-c]吡唑-7(1H)-酮, 膦酯
Base-mediated cyclization of 1-diazo-2,4-dioxo-5-ynylphosphonate provided novel 3-phosphonyl pyrano[3,2-c] pyrazol-7(1H)-one derivatives in 48%~99% yields. Mild conditions, simple manipulation and functional group diversity are the salient features of this methodology.
Key words: synthesis, base, cyclization, pyrano[3,2-c]pyrazol-7(1H)-one, phosphonate
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