An efficient method for the phosphonation of C=X compounds
作者:A. O. Kolodyazhnaya、O. O. Kolodyazhnaya、O. I. Kolodyazhnyi
DOI:10.1134/s1070363210040055
日期:2010.4
(aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated olefins) in the presence of amines and anilines hydrohalides was studied. We found that pyridine hydrohalides effectively activate the reaction of tralkyl phosphites with various C=X electrophiles: aldehydes, ketones, ketophosphonates, aldimines, ketimines, isocyanates, isothiocyanates, and activated
Amberlite-IR 120 catalyzed three-component synthesis of α-amino phosphonates in one-pot
作者:Asish K. Bhattacharya、Kalpeshkumar C. Rana
DOI:10.1016/j.tetlet.2008.02.102
日期:2008.4
A simple, efficient, and environmentally benign method for a three-component reaction of an amine, an aldehyde or a ketone, and diethyl phosphite catalyzed by Amberlite-IR 120 resin has been developed to afford α-amino phosphonates in high yields and short reaction times under solvent-free reaction conditions. The major advantages of the present method are good yields, inexpensive, ecofriendly and
Pyridinium perchlorate: A new catalyst for the reaction of trialkyl phosphites with the C=X electrophiles
作者:O. O. Kolodyazhnaya、O. I. Kolodyazhnyi
DOI:10.1134/s107036321102006x
日期:2011.2
Pyridinium perchlorate is an effective catalyst for the reaction of trialkyl phosphites with various C=X electrophiles: aldehydes, ketones, ketophosphonates, imines, isocyanates, isothiocyanates, and activated alkenes. The reaction leads to the formation of alpha-substituted phosphonates in a high yield. Advantages of the new catalyst are its high activity, availability, high product yields, and mild reaction conditions.