Magnetic Fe<sub>3</sub>O<sub>4</sub>Nanoparticle-Supported Phosphotungstic Acid as a Recyclable Catalyst for the Kabachnik-Fields Reaction of Isatins, Imines, and Aldehydes under Solvent-Free Conditions
作者:Mohd Nazish、S. Saravanan、Noor-ul H. Khan、Prathibha Kumari、Rukhsana I. Kureshy、Sayed H. R. Abdi、Hari C. Bajaj
DOI:10.1002/cplu.201402191
日期:2014.9.22
reaction of isatins, imines, and aldehydes using dimethyl and diethylphosphite as a nucleophile to give the corresponding α‐hydroxy and α‐amino phosphonates in excellent yields for a wide range of substrates. The reaction conditions were simple, green, and efficient. The catalyst was recycled up to five times with retention of its activity. Based on the NMR spectroscopy studies, a probable catalytic cycle
Lithium Perchlorate-Catalyzed Three-Component Coupling: A Facile and General Method for the Synthesis ofα-Aminophosphonates under Solvent-Free Conditions