REACTION OF N-ALKYLPYRIDINIUM SALTS WITH PHOSPHORUS TRICHLORIDE
作者:Raj K. Bansal、Neelima Gupta、Rakhi Gupta、Garima Pandey、Mamta Agarwal
DOI:10.1080/10426509608046355
日期:1996.5.1
1 having activated N-methylene group react with phosphorus trichloride to give N-(dichlorophosphinomethylene)pyridinium ylides 2. The site of the reaction in 1,2-dialkylpyridinium halides 3 under these conditions is determined by the relative activation of 1- and 2-methylene groups; in the absence of sufficient activation of N-methylene group, reaction occurs at the 2-methylene group to give dichlorophosphinylated