(S)-3-Methyl-2-((R)-2-{(S)-2-[((R)-pyrrolidine-2-carbonyl)-amino]-propionylamino}-propionylamino)-butyric acid 2,5-dioxo-pyrrolidin-1-yl ester 以
吡啶 为溶剂,
反应 40.0h,
以40%的产率得到(5S,8R,11S,13aR)-5-Isopropyl-8,11-dimethyl-decahydro-3a,6,9,12-tetraaza-cyclopentacyclododecene-4,7,10,13-tetraone