Reactions of acyl phosphonates with organoaluminum reagents: a new method for the synthesis of secondary and tertiary α-hydroxy phosphonates
作者:Ozlem Seven、Sidika Polat-Cakir、Md. Shakhawoat Hossain、Mustafa Emrullahoglu、Ayhan S. Demir
DOI:10.1016/j.tet.2011.03.036
日期:2011.5
) with aryl and alkyl acyl phosphonates, which lead to the formation of α-hydroxyphosphonates in moderate to good yields, are reported. This method provides easy access to secondary and tertiary α-hydroxyphosphonates depending on the reaction conditions. The reactions of triethylaluminum with a series of acyl phosphonates at 0 °C gave the secondary α-hydroxyphosphonates, while at −100 °C they afford
The catalytic aerobic synthesis of quaternary α-hydroxy phosphonates via direct hydroxylation of phosphonate compounds
作者:Lijun Gu、Cheng Jin、Hongtao Zhang
DOI:10.1039/c4nj02072c
日期:——
A highly efficient Cu-catalyzed direct hydroxylation of phosphonate compounds has been developed. This transformation provides a powerful method for the synthesis of quaternary α-hydroxyphosphonates in good yields. The direct transformation process, regiospecific selectivity, and good tolerance to a variety of substituents make it an alternative approach to the reported protocols.
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 unexpected reactivity of simple heterogeneous mixture of γ-alumina and potassium fluoride : 1-hydroxyalkane phosphonic esters synthesis from non-activated ketones in “dry media”.
作者:Françoise Texier-Boullet、Maryvonne Lequitte
DOI:10.1016/s0040-4039(00)84837-6
日期:1986.1
Abramow; Semenowa, Sb. Statei Obshch. Khim., 1953, p. 393,395