Regiochemistry of the Reaction of Ethoxyacetylene with 2,2,2-Trichlorobenzo[d]-1,3,2#lambda#~5-dioxaphosphole, as Studied by Dynamic ~(13)C and ~(31)P NMR Spectroscopy

摘要

It is known that alkoxyacetylenes react with PCl_5 to give phosphonium salts, the products of electrophilic addition across the C(ident to)C bond, [ROC(Cl)=CHPCl_3]~+. PCl_6~-. Their structure was not elucidated exactly because of their lability and low solubility [1,2]. Contrary to PCl_5, 2,2,2-trichlorobenzo[d]-1,3,2#lambda#~5-dioxaphosphole I is readily soluble in the majority of organic solvents and is therefore a convenient object for dynamic NMR experiments [3].