Abstract
The highly efficient gram-scale method for preparation of up to date hardly available N6-phosphorylated sydnone imines based on the reaction of sydnone imine hydrochlorides with substituted phosphinate or phosphonate acids chlorides in the presence of a base was elaborated. A possibility of straight deprotonation of sydnone imines with n-BuLi followed by the reaction 4-Li-derivatives thus obtained with electrophiles was demonstrated. Novel representatives of bicyclic sydnone imines fused via 4,5-edge of the oxadiazolium ring were obtained. Also sydnone imines containing both phosphorus and sulfur functionalities were obtained with high yields.
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