benzyl (5R)-3-aza-2,2-diethyl-5-(9H-9-fluorenylmethoxycarboxamido)-8-(3-[(2,3-dihydro-2,2,4,6,7-pentamethyl-2H-1-benzofuran-5-yl)sulfonyl]guanidino)-4-oxooctanoate 在
哌啶 作用下,
以
乙腈 为溶剂,
以63%的产率得到benzyl (5R)-5-amino-3-aza-2,2-diethyl-8-(3-[(2,3-dihydro-2,2,4,6,7-pentamethyl-2H-1-benzofuran-5-yl)sulfonyl]guanidino)-4-oxooctanoate