A convenient method for the preparation of mono N-alkylated cyclams and cyclens in high yields
作者:Cong Li、Wing-Tak Wong
DOI:10.1016/s0040-4039(02)00497-5
日期:2002.4
Selective and high yield synthesis of mono N-substituted derivatives of cyclam and cyclen can be achieved by using a direct and general synthetic method with very mild reaction conditions.
A Simple, Regioselective Synthesis of 1,4-Bis(<i>tert</i>-butoxycarbonylmethyl)- tetraazacyclododecane
作者:Cong Li、Wing-Tak Wong
DOI:10.1021/jo026436+
日期:2003.4.1
A convenient synthetic route to 1,4-bis(tert-butoxycarbonylmethyl)tetraazacyclododecane (cyclen) (1) with high yield and excellent regioselectivity is described. Compound 1 reacted with a range of functionalized alkyl halides under two reaction conditions to give mono-N-alkylated 1,4-bis(tert-butoxycarbonylmethyl)tetraazacyclododecane (2-9) in good yield.