4-nitrophenyl ((3R,3aS,3bS,6aR,7aS)-octahydrodifuro[2,3-b:3',2'-d]furan-3-yl) carbonate 、
N-((2R,3S)-3-amino-2-hydroxy-4-phenylbutyl)-N-isobutyl-4-methoxybenzenesulfonamide 在
N,N-二异丙基乙胺 作用下,
以65%的产率得到[(1S,2S,3R,6S,8R)-5,7,9-trioxatricyclo[6.3.0.02,6]undecan-3-yl] N-[(2S,3R)-3-hydroxy-4-[(4-methoxyphenyl)sulfonyl-(2-methylpropyl)amino]-1-phenylbutan-2-yl]carbamate