(S)-tert-butyl 3-((2-(pent-4-enoyloxy)ethyl)carbamoyl)hex-5-enoate 、 (S,E)-tert-butyl 2-(5,12-dioxo-1-oxa-4-azacyclododec-8-en-6-yl)acetate 、
三氟乙酸 、 (S,E)-2-(5,12-dioxo-1-oxa-4-azacyclododec-8-en-6-yl)acetic acid 、
对氯苄胺 在
ice water 作用下,
以
二氯甲烷 、
methanol-dichloromethane 为溶剂,
反应 4.0h,
以The product (70 mg) was obtained as a white solid in 58% yield over 3 steps after column chromatography (MeOH/DCM gradient)的产率得到