7-methoxycarbonyl-2-chloromethylcarbonylaminomethyl-1-azaxanthone 、
(SS)-1,7-bis(diethyl-N-acetyl-S-glutamate)-4-carboxylic acid tert-butyl ester-1,4,7,10-tetraazacyclododecane 在
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
反应 24.0h,
以71%的产率得到tert-butyl 4,10-bis({[(2S)-1-ethoxy-1-oxopropan-2-yl]carbamoyl}methyl)-7-[(([7-(methoxycarbonyl)-5-oxo-5H-chromeno[2,3-b]pyridin-2-yl]methyl)carbamoyl)methyl]-1,4,7,10-tetraazacyclododecane-1-carboxylate