溴乙酸乙酯 、
1,4,8,11-四氮杂环十四烷 、
potassium carbonate 在
1,4,8,11-四氮杂环十四烷 、
(1,4,8,11-tetraazacyclotetradec-1-yl)acetic acid ethyl ester 作用下,
以
氯仿 为溶剂,
反应 48.0h,
以ethyl (1,4,8,11-tetraazacyclotetradec-1-yl)ethanoate (so-called compound 5.0) is thereby obtained, as 11.21 g of a slightly yellow oil (yield=98%) which的产率得到(1,4,8,11-tetraazacyclotetradec-1-yl)acetic acid ethyl ester