New Catalyst for Phosphonylation of C˭X Electrophiles
作者:Oleg I. Kolodiazhnyi、Olga O. Kolodiazhna
DOI:10.1080/00397911.2010.542602
日期:2012.6
recyclable catalyst for the reaction of trialkylphosphites with various C˭X electrophiles (aldehydes, ketones, ketophosphonates, imines, isocyanates, isothiocyanates, activated alkenes) to afford corresponding α-substituted phosphonates in good yields. The main advantages of the new catalyst is strong activity, accessibility, good yields of products, and gentle conditions of reaction. GRAPHICAL ABSTRACT
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.
Synthesis of α-hydroxy(polyprenyl) bisphosphonates
作者:O. O. Kolodyazhnaya、O. I. Kolodyazhnyi、R. A. Cherkasov、A. R. Garifzyanov、N. V. Davletshina、S. A. Koshkin
DOI:10.1134/s1070363214040082
日期:2014.4
Bisphosphonates derived from natural terpenes were synthesized by phosphonylation of corresponding aldehydes. The general strategy of introduction of the phosphonate groups into the polyprenol molecule involves successive treatment of a hydroxyl compound by Swern reagent to oxidize the C-OH group into C=O and a (EtO)(3)P/[PyH]+ClO (-) (4) mixture to phosphylate the resulting carbonyl compound.