Convenient synthesis of α-diarylmethylphosphonates by HOTf catalyzed Friedel-Crafts arylation of α-aryl α-hydroxyphosphonates
作者:Long Chen、Yun-Xiang Zou、Xin-Yue Fang、Xu Yin
DOI:10.1080/10426507.2017.1393424
日期:2018.3.4
GRAPHICAL ABSTRACT ABSTRACT We report a convenient catalytic Friedel-Crafts arylation of α-aryl α-hydroxyphosphonates with various (hetero)aromatic compounds. HOTf (trifluoromethanesulfonic acid) is identified to be the best Brønstedacid catalyst, and the desired α-diarylmethylphosphonates were obtained in up to 41–95% yield.
SUBSTRATE RELATED O,O-DIALKYLDIPEPTIDYLY ψ CARBOXYBENZYLPHOSPHONATES, A NEW TYPE OF THROMBIN INHIBITOR
作者:Donovan Green、Said Elgendy、Geeta Patel、Emmanuel Skordalakes、Christopher A. Goodwin、Micheal F. Scully、Vijay V. Kakkar、John J. Deadman
DOI:10.1080/10426500008044999
日期:2000.1
O,O-Dialkyl alpha-hydroxybenzylphosphonates (1) were coupled to substrate derived dipeprides (2), using an active ester methodology approach to generate a series of phosphonotripeptides (3) with a carboxy ester linkage between the "P1" and "P2" positions of the molecule. These compounds inhibit thrombin in the micromolar range.
Highly efficient and extremely simple protocol for the oxidation α-hydroxyphosphonates to α-ketophosphonates using Dess-Martin periodinane
作者:Ravindra V. Kupwade、Satish D. Mitragotri、Makarand A. Kulkarni、Uday V. Desai、Prakash P. Wadagaonkar
DOI:10.24820/ark.5550190.p011.213
日期:——
Highly efficient green synthesis of α-hydroxyphosphonates using a recyclable choline hydroxide catalyst
作者:Reddi Mohan Naidu Kalla、Yu Zhang、Il Kim
DOI:10.1039/c6nj03948k
日期:——
Choline hydroxide has been found to be an efficient basic ionic liquid catalyst for the synthesis of α-hydroxyphosphonates. Hydrophosphonylation of aldehydes was performed via the nucleophilic addition of diethylphosphite to aldehydic carbonyl compounds, in the presence of choline hydroxide under neat as well as solvent conditions. A wide array of substrates, including aromatic, fused aromatic, and