Lewis Acid Enables Ketone Phosphorylation: Synthesis of Alkenyl Phosphonates
作者:Xiao‐Hong Wei、Chun‐Yuan Bai、Lian‐Biao Zhao、Ping Zhang、Zhen‐Hua Li、Yan‐Bin Wang、Qiong Su
DOI:10.1002/cjoc.202100083
日期:2021.7
efficient Lewis acid enabled ketones phosphonylation to synthesize vinylphosphonates has been developed. This method relays on ketone hydrophosphonylation/α-hydroxy phosphonates unimolecular elimination (E1) dehydration cascade reaction sequence. Various C—P bond formation products were obtained in moderate to excellent yields with water as the only byproduct in the reaction.
A novel organocatalytic, direct synthesis of α-hydroxyphosphonates via reaction of aldehydes and ketones with trimethylphosphite in the presence of catalytic amounts of pyridine 2,6-dicarboxylic acid in water is reported. The method is simple, cost-effective and environmentally benign. α-hydroxyphosphonates - organocatalyst - pyridine 2,6-dicarboxylic acid - nucleophilic addition - water
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.
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。