4,10-bis-[((S)-1-phenyl-ethylcarbamoyl)-methyl]-1,4,7,10-tetraaza-cyclododecane-1-carboxylic acid tert-butyl ester 、 2-bromomethyl-7-methoxycarbonyl-azaxanthone 在
potassium carbonate 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以77%的产率得到2-(7-tert-butoxycarbonyl-4,10-bis-[((S)-1-phenyl-ethylcarbamoyl)-methyl]-1,4,7,10-tetraaza-cyclododec-1-ylmethyl)-10-oxo-10H-9-oxa-1-aza-anthracene-6-carboxylic acid methyl ester