Facile and Stereospecific Synthesis of cis-3-(N′-Arylureido)-2,3-dihydro-2-phenyl-1,2-Benzoxaphosphole 2-Oxides
作者:Jia Zhou、Yongge Qiu、Kesheng Feng、Ruyu Chen
DOI:10.1055/s-1999-3380
日期:1999.2
A simple method for the preparation of cis-3-(N′-arylureido)-2,3-dihydro-2-phenyl-1,2-benzoxaphosphole 2-oxides 7 in moderate to high yields consists in the three-component reaction of phenyldichlorophosphine with salicylaldehyde and arylureas in anhydrous benzene. The stereochemistry and the possible reaction mechanism of the cyclizations are also discussed. The results presented in this paper provide a new general and efficient approach to the novel organophosphorus heterocycles with the 3-substituted 2,3-dihydro-1,2-benzoxaphosphole 2-oxide ring system.
一种以中等至高产率制备顺式-3-(N'-芳基脲基)-2,3-二氢-2-苯基-1,2-苯并氧磷杂环磷酯 2-氧化物 7 的简单方法,包括以下三组分反应:苯基二氯膦与水杨醛和芳基脲在无水苯中反应。还讨论了环化的立体化学和可能的反应机制。本文提出的结果为具有3-取代的2,3-二氢-1,2-苯并氧磷杂环系统的新型有机磷杂环提供了一种新的通用且有效的方法。