(S)-2-[(R)-2-(2-Allyl-2-tert-butoxycarbonylamino-pent-4-enoylamino)-3-methyl-butyrylamino]-3-methyl-butyric acid methyl ester 在
Grubbs catalyst first generation 作用下,
以
甲苯 为溶剂,
反应 12.0h,
以53%的产率得到(S)-2-{(R)-2-[(1-tert-Butoxycarbonylamino-cyclopent-3-enecarbonyl)-amino]-3-methyl-butyrylamino}-3-methyl-butyric acid methyl ester