(S)-2-[Allyl-((S)-3-tert-butoxycarbonylamino-hex-5-enoyl)-amino]-propionic acid methyl ester 在
Grubbs catalyst first generation 作用下,
以
1,2-二氯乙烷 为溶剂,
以61%的产率得到(S)-2-((Z)-(S)-4-tert-Butoxycarbonylamino-2-oxo-3,4,5,8-tetrahydro-2H-azocin-1-yl)-propionic acid methyl ester