N1,N2-bis(tert-butoxycarbonyl)-N1-(propargyl)-S-methylisothiourea 、
tert-butyl N-[({8-[(8-aminooctyl)amino]octyl}amino)({[(tert-butoxy)carbonyl]amino})methylidene]carbamate 以
四氢呋喃 为溶剂,
以92%的产率得到2,6-[(di-tert-butoxycarbonyl)diimido]-3-propargyl-5-tert-butoxycarbonyl-1,3,5,7,16-pentaazacyclotetracosan-4-one