A process for the preparation of 1,4,7,10-tetraazacyclododecane

摘要

A process for the preparation of 1,4,7,10-tetraazacyclododecane of formula (I), starting from decahydro-2a,4a,6a,8a-tetraazacyclopent[fg]acenaphthylene of formula (II): comprising the direct step of hydrolysis in aqueous solution, in conditions of slightly acid, neutral or slightly basic pH, with a primary diamine of formula (V), in which x ranges between 0 and 2, and Q is -CH2CH(OH)CH2-, -(CH2)2NH(CH2)2-, or -[(CH2)2NH]2(CH2)2, when x is 1, or Q is -CH2- when x is 2.