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.
Solvent-Free Synthesis of Tertiaryα-Hydroxyphosphates by the Triethylamine-Catalyzed Hydrophosphonylation of Ketones
作者:Chubei Wang、Jianwei Zhou、Xingbin Lv、Junlei Wen、Hongwu He
DOI:10.1080/10426507.2013.765874
日期:2013.10.1
A new, environmentally benign, convenient, and easy method of synthesizing tertiary -hydroxyphosphonates by the triethylamine-catalyzed hydrophosphonylation of unactivated ketones was developed. In the presence of triethylamine, aromatic or heteroaromatic ketones can react with phosphite to form tertiary -hydroxyphosphonates under solvent-free and mild conditions. The proposed method was also suitable for functionalized ketones.
C–H Hydroxylation of Phosphonates with Oxygen in [bmIm]OH To Produce Quaternary α-Hydroxy Phosphonates
作者:Xiangguang Li、Cheng Jin、Lijun Gu
DOI:10.1021/jo502883q
日期:2015.2.20
A highly efficient and mild [bmIm]OH-catalyzed a-hydroxylation of phosphonates using O-2 as the oxygen source is described. The employment of ionic liquid under mild reaction conditions makes this transformation green and practical. Especially, this reaction provided a novel and convenient methodology for the construction of quaternary a-hydroxy phosphonates.