Novel Bisphosphonates Derived from 1<i>H</i>-Indazole, 1<i>H</i>-Pyrazolo[3,4-<i>b</i>]Pyridine, and 1<i>H</i>-Pyrazolo[3,4-<i>b</i>]Quinoline
作者:Fátima C. Teixeira、Carla Lucas、M. João M. Curto、António P. S. Teixeira、M. Teresa Duarte、Vânia André
DOI:10.1002/hc.21282
日期:2016.1
Novel tetraethyl ethylene-1,1-bisphosphonate esters derived from 1H-indazole, 1H-pyrazolo[3,4-b]pyridine, and 1H-pyrazolo[3,4-b]quinoline were synthesized by a Michael addition reaction of tetraethyl ethylidene-1,1-bisphosphonate with the corresponding heterocycle, using conventional heating and microwave-assisted methods. The microwave-assisted method provides shorter reaction times and better yields
1H-吲唑、1H-吡唑并[3,4-b]吡啶和1H-吡唑并[3,4-b]喹啉的四乙基亚乙基-1,1-双膦酸酯通过四乙基亚乙基的迈克尔加成反应合成-1,1-二膦酸酯与相应的杂环,使用常规加热和微波辅助方法。微波辅助方法提供更短的反应时间和更好的产率。分别使用浓盐酸或 TMSBr/可力丁水解双膦酸盐,得到相应的双膦酸或盐。所有新化合物都经过充分表征,并使用 1H、31P 和 13C NMR 和 IR 光谱和质谱确定了它们的结构。X射线衍射研究证实了化合物6的分子结构。