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,
Reaction of 2<i>H</i>-Azirine-Phosphine Oxides and -Phosphonates with Enolates Derived from β-Keto Esters
作者:Ander Vélez del Burgo、Ana M. Ochoa de Retana、Jesús M. de los Santos、Francisco Palacios
DOI:10.1021/acs.joc.5b02347
日期:2016.1.4
Cyclopenta[b]-pyrrole-2-phosphine oxides 4a and -phosphonates 4b,c are generated by the addition of cyclic enolatesderivedfrom ethyl 2-oxo-cyclopentanecarboxylate 2 to phosphorated 2H-azirines 1. However, the addition of enolatederivedfrom acyclic 2-oxo-butanoate 10 to 2H-azirine phosphine oxide 1 led to vinylogous N-acyl-α-aminoalkyl phosphine oxides 12, involving the carbonyl group and the Cα
环戊二烯并[ b ]吡咯-2-膦氧化物4A和-phosphonates 4B,Ç通过加入选自乙基-2-氧代环戊烷羧酸衍生的烯醇化物的循环而产生2至磷化2 ħ -azirines 1。然而,将衍生自无环2-氧代丁酸酯10的烯醇盐添加至2 H-叠氮基氧化膦1导致乙烯基的N-酰基-α-氨基烷基氧化膦12,其涉及酮酸酯10的羰基和Cα 。乙烯基衍生物12的闭环在碱的存在下提供吡咯-2-氧化膦11。将茚满酮羧酸盐15衍生的烯醇盐添加到2 H- azirines 1中,导致形成官能化的N-取代的1 H-苯并[ d ]氮杂衍生物17。