High-pressure approach to the synthesis of N,N′-dimethyl diazacornands
Abstract
α,ω-Tertiary diamines react under high pressure with α,ω-di-iodo compounds to give the cyclic bis-quaternary salts in almost quantitative yields and their subsequent demethylation with triphenylphosphine affords N,N′-dimethyl diazacoronands in high yield.