Synthesis of new aryl-substituted methylphosphonic and methylenediphosphonic acids and their derivatives
作者:A. A. Prishchenko、M. V. Livantsov、O. P. Novikova、L. I. Livantsova、V. S. Petrosyan
DOI:10.1007/s11172-017-1736-5
日期:2017.2
Simple and versatile synthetic procedures towards new aryl-substituted hydroxymethylphosphonic and methylenediphosphonic acids via reactions of either aromatic aldehydes or their derivatives with phosphites were elaborated.
The First Synthesis of Diethyl α,α-Chlorofluorobenzylphosphonates
作者:Zhi Guan、Di Wu、Yanhong He、Rongchang Tang
DOI:10.1055/s-0029-1217564
日期:2009.8
Starting from α-hydroxyphosphonates, a wide variety of diethylα,α-chlorofluorobenzylphosphonates have been obtained in pure form in a two-step procedure. The first step was chlorination of α-hydroxyphosphonates with Ph 3 P and CCl 4 , while the second step was fluorination with N-fluorobisbenzenesulfonimide.
Controlled monohalogenation of phosphonates: A new route to pure α-monohalogenated diethyl benzylphosphonates
作者:Bogdan Iorga、Frédéric Eymery、Philippe Savignac
DOI:10.1016/s0040-4020(99)00037-x
日期:1999.2
Starting from diethyl benzylphosphonates, a wide variety of diethyl α-monofluoro, chloro, bromo and iodobenzylphosphonates have been obtained in pure form by a one-pot procedure. This high yielding method implies the intermediate protection of the benzyl anion with TMSCl followed by halogenation with an electrophilic halogenating reagent.
Palladium-Catalyzed Migratory Insertion of Isocyanides for Synthesis of <i>C</i>-Phosphonoketenimines
作者:Qiang Yang、Chong Li、Ming-Xing Cheng、Shang-Dong Yang
DOI:10.1021/acscatal.6b01253
日期:2016.7.1
An efficient method for the synthesis of C-phosphonoketenimines through palladium-catalyzed migratory insertion of isocyanides has been developed for the first time. This procedure tolerates wide functional groups and has a good atom economy. Further transformations of the products, which are useful building blocks for the β-aminophosphonates, β-aminovinylphosphonates, and C-phosphorylated tetrazoles