Selective Synthesis of Substituted Pyrrole-2-phosphine Oxides and -phosphonates from 2<i>H</i>-Azirines and Enolates from Acetyl Acetates and Malonates
作者:Francisco Palacios、Ana M. Ochoa de Retana、Ander Vélez del Burgo
DOI:10.1021/jo201932m
日期:2011.11.18
simple and efficient selective synthesis of 1H-pyrrole-2-phosphine oxides 3 and -phosphonates 7 by addition of enolates derived from acetyl acetates to 2H-azirinylphosphine oxide 1 and -phosphonate 6 is reported. Nucleophilic addition of enolates derived from diethyl malonate to 2H-azirines 1 and 6 led to the formation of functionalized 2-hydroxy-1H-pyrrole-5-phosphine oxide 9 and -phosphonate 10,
一个简单的和1个的有效的选择性合成ħ吡咯-2-膦氧化物3和-phosphonates 7通过加入从乙酰乙酸酯衍生的2烯醇化物的ħ -azirinylphosphine氧化物1和膦酸二6报道。丙二酸衍生的烯酸酯的亲核性加成到2 H-叠氮基1和6导致官能化的2-羟基-1 H-吡咯-5-氧化膦9和-膦酸酯10形成,而乙烯基α-氨基烷基氧化膦则形成14和10。 -膦酸盐15可以从叠氮基获得,而烯醇盐得自2-苯基丙二酸二乙酯。在碱的存在下乙烯基衍生物14和15的闭环导致形成包含氧化膦17或膦酸酯基团18的1,5-二氢-3-吡咯啉-2-酮。