benzyl (5R,8R,11S)-11-allyl-1-(9H-fluoren-9-yl)-3,6,9-trioxo-5,8-bis(3-(3-((2,2,5,7,8-pentamethylchroman-6-yl)sulfonyl)guanidino)propyl)-2-oxa-4,7,10-triazadodecan-12-oate 在
哌啶 作用下,
以
乙腈 为溶剂,
以94%的产率得到benzyl (2S,5R,8R)-2-allyl-8-amino-3,6-diaza-11-([(3,4-dihydro-2,2,5,7,8-pentamethyl-2H-1-benzopyran-6-yl)sulfonyl]guanidino)-5-(3-([(3,4-dihydro-2,2,5,7,8-pentamethyl-2H-1-benzopyran-6-yl)sulfonyl]guanidino)propyl)-4,7-dioxoundecanoate