Synthesis of 2H-Thiopirano[3,4-c]pyrazol-7-one Derivatives as the First Example a New Heterocyclic System
作者:T. I. Chaban、Y. E. Matiichuk、V. S. Matiychuk
DOI:10.1134/s1070363220070257
日期:2020.7
rhodanine. Under the action of NaOH, the prepared pyrazole-3-carboxylates underwent recyclization to form 2-aryl-7-oxo-2,7-dihydrothiopyrano[3,4-c]pyrazole-5-carboxylic acids—the first representatives of new heterocyclic system.
摘要结果获得了一系列的4-[(Z)-(4-氧代-2-硫代氧代-1,3-噻唑烷-5-亚甲基)甲基] -1-芳基-1 H-吡唑-3-羧酸乙酯4-甲酰基-1-芳基-1 H-吡唑-3-羧酸乙酯与若丹宁的反应 在NaOH的作用下,制得的吡唑-3-羧酸酯经过再循环形成2-芳基-7-氧代-2,7-二氢硫代吡喃并[3,4- c ]吡唑-5-羧酸,这是新杂环的第一个代表系统。