A Lewis acid catalyst has been first applied to the hydrophosphonylation of ketones, giving the corresponding quaternary α-hydroxy phosphonates in high yields (up to 98%). The present method was highly tolerable for functionalized ketones. Moreover, the first catalytic enantioselective hydrophosphonylation of an unactivated ketone was also realized by using a tridentate Schiff base-titanium complex
An efficient and simple synthesis of α‐hydroxyphosphonates via reaction of aldehydes and ketones with dimethylphosphite in the presence of MgCl2/Et3N base system is reported. The use of readily available and easy to handle reagent MgCl2/Et3N makes this method simple, convenient, and practical.
据报道,在MgCl 2 / Et 3 N碱体系存在下,醛和酮与亚磷酸二甲酯反应可有效,简单地合成α-羟基膦酸酯。使用易于获得且易于处理的试剂MgCl 2 / Et 3 N使该方法简单,方便且实用。
1,5,7-Triazabicyclo[4.4.0]dec-1-ene (TBD), 7-methyl-TBD (MTBD) and the polymer-supported TBD (P-TBD): three efficient catalysts for the nitroaldol (Henry) reaction and for the addition of dialkyl phosphites to unsaturated systems
作者:Daniele Simoni、Riccardo Rondanin、Massimo Morini、Riccardo Baruchello、Francesco Paolo Invidiata
DOI:10.1016/s0040-4039(99)02340-0
日期:2000.3
The 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) and its 7-methyl derivative (MTBD) have been proven to be of great synthetic utility as catalysts in the nitroaldol (Henry) reaction and for the addition of dialkyl phosphites to a variety of carbonyl compounds. The catalysts were in many cases superior to the parent tetramethylguanidine (TMG). In general the reaction proceeds in a few minutes at 0 degrees C. The polymer-supported-TBD (P-TBD) was also proven to be an efficient promoter of the above cited nucleophilic additions. (C) 2000 Elsevier Science Ltd. All rights reserved.
Abramow, Zhurnal Obshchei Khimii, 1952, vol. 22, p. 647,650; engl. Ausg. S. 709, 711
作者:Abramow
DOI:——
日期:——
Benezra,C. et al., Bulletin de la Societe Chimique de France, 1967, p. 1140 - 1145