Alcoholysis of Phosphaisocoumarins and Synthesis of 2-(2-Oxoalkyl)phenylphosphonates
作者:Ai-Yun Peng、Yu-Juan Guo、Zhi-Hai Ke、Shizheng Zhu
DOI:10.1002/ejoc.200800616
日期:2008.11
4-bromophosphaisocoumarins underwent a dehalogenation–alcoholysis tandem reaction. The possible mechanism for the alcoholysis reaction was discussed. In addition, direct access to 2-(2-oxoalkyl)phenylphosphonates was developed by the mercury(II)-catalyzed hydration of 2-(1-alkynly)phenylphosphonates with high regioselectivity. In a preliminary study, the obtained novel keto phosphonates showed medium inhibitory
磷酸异香豆素不发生氨解,但发现它们在醇和伯胺的存在下对醇解敏感。本文研究了这种意想不到的醇解反应,发现在 Et3N 或 K2CO3 存在下,4-未取代和 4-氯代磷杂香豆素顺利进行醇解反应,以良好的收率得到一系列 2-(2-氧代烷基)苯基膦酸酯,而 4 -碘-和4-溴磷异香豆素经历了脱卤-醇解串联反应。讨论了醇解反应的可能机理。此外,通过汞(II)催化的具有高区域选择性的 2-(1-炔基)苯基膦酸酯的水合开发了直接获得 2-(2-氧代烷基)苯基膦酸酯的方法。在初步研究中,获得的新型酮膦酸盐对α-胰凝乳蛋白酶显示中等抑制活性。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)