Zirconium(IV) Compounds As Efficient Catalysts for Synthesis of α-Aminophosphonates
作者:Srikant Bhagat、Asit K. Chakraborti
DOI:10.1021/jo8009006
日期:2008.8.1
Zirconium(IV) compounds are reported as excellent catalysts for a three-component one-pot reaction of an amine, an aldehyde or a ketone, and a di/trialkyl/aryl phosphite to form α-aminophosphonates under solvent-free conditions at rt. Among the various zirconiumcompounds, ZrOCl2·8H2O and ZrO(ClO4)2·6H2O were most effective. The reactions were faster with dialkyl/diaryl phosphites than with trialkyl/triaryl
An Extremely Efficient Three-Component Reaction of Aldehydes/Ketones, Amines, and Phosphites (Kabachnik−Fields Reaction) for the Synthesis of α-Aminophosphonates Catalyzed by Magnesium Perchlorate
作者:Srikant Bhagat、Asit K. Chakraborti
DOI:10.1021/jo062140i
日期:2007.2.1
an extremely efficient catalyst for the synthesis of α-aminophosphonates. A three-component reaction (3-CR) of an amine, an aldehyde or a ketone, and a di-/trialkyl phosphite (Kabachnik−Fields reaction) took place in one pot under solvent-free conditions to afford the corresponding α-aminophosphonates in high yields and short times. The use of solvent retards the rate of the reaction and requires a
α-Aminophosphonates as novel anti-leishmanial chemotypes: synthesis, biological evaluation, and CoMFA studies
作者:Srikant Bhagat、Parth Shah、Sanjeev K. Garg、Shweta Mishra、Preet Kamal Kaur、Sushma Singh、Asit K. Chakraborti
DOI:10.1039/c3md00388d
日期:——
α-Aminophosphonates have been identified as novel anti-leishmanial chemotypes against theL. donovanipromastigote with low μM range activity.
α-氨基膦酸酯已被确定为针对L. donovani原虫具有低微米范围活性的新型抗利什曼病化合物。
Graphene Oxide as Recyclable Catalyst for One-Pot Synthesis of α-Aminophosphonates
作者:Kiran B. Dhopte、Dnyaneshwar S. Raut、Anand V. Patwardhan、Parag R. Nemade
DOI:10.1080/00397911.2014.989447
日期:2015.3.19
Abstract We report the synthesis of α-aminophosphonates from aromatic aldehydes, aromatic and aliphatic amines, and trimethylphosphite (Kabachnik–Fieldsreaction) using a “carbocatalyst,” graphene oxide, at room temperature with excellent yield and recyclability. Enhanced catalytic activity of graphene oxide as compared to other catalysts studied is possibly due to the presence of carboxylic acid and
Silica supported polyphosphoric acid (PPA-SiO_2): an efficient and reusable heterogeneous catalyst for the one-pot synthesis of \alpha -amino phosphonates
An efficient green protocol is described for the preparation of \alpha -amino phosphonates, employing a one-pot three-component condensation reaction between aldehydes, amines, and trialkyl phosphites in the presence of PPA-SiO_2 under solvent-free conditions at 80 °C. The present procedure offer advantages such as high to excellent yields, short reaction time, inexpensiveness, recovery, and reusability of catalyst.
在 80 °C 无溶剂条件下,在 PPA-SiO_2 存在下,采用醛、胺和三烷基膦酸盐之间的单锅三组分缩合反应,描述了制备 \alpha -氨基膦酸盐的高效绿色方案。本方法具有产率高、反应时间短、无毒、可回收和催化剂可重复使用等优点。