Direct conversion of secondary phosphine oxides and<i>H</i>-phosphinates with [Di(acyloxy)iodo]benzenes to phosphinic and phosphonic amides
作者:Anna Hubacz、Slawomir Makowiec
DOI:10.1002/hc.20514
日期:——
process plays a main role leading to the formation of carboxylic amides through mixed phosphoric–carboxylic anhydride, and also in the low concentration of amines, tetrahydrofuran effectively competes with the amines in the nucleophilic attack on the acylating intermediates. © 2009 Wiley Periodicals, Inc. Heteroatom Chem 20:81–86, 2009; Published online in Wiley InterScience (www.interscience.wiley.com)
[二(酰氧基)碘]苯与仲氧化膦或H-次膦酸盐在伯胺或仲胺存在下的反应允许人们在一锅法中获得次膦酸或膦酸酰胺。我们利用强酰化系统 DAIB/R2P(O)H 对胺进行膦酰化。然而,反应机制是多途径的,并且导致次膦酸或膦酸酰胺的产率适中。当胺的浓度低时,分子间过程起主要作用,导致通过混合磷酸-羧酸酐形成羧酰胺,而且在低浓度的胺中,四氢呋喃有效地与胺竞争亲核攻击酰化中间体。© 2009 Wiley Periodicals, Inc. 杂原子化学 20:81–86, 2009; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20514