2-苯乙基异氰酸酯 、
帕马苷 在
吡啶 、 4 A molecular sieve 作用下,
反应 1.5h,
生成 [(2R,3S,4S,5R,6S)-6-[(2R,3S,4R,5R,6R)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(1S,2S,4S,5'R,6R,7S,8R,9S,12S,13S,16S,18S)-5',7,9,13-tetramethyl-11-oxospiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosane-6,2'-oxane]-16-yl]oxyoxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methyl N-(2-phenylethyl)carbamate