L-vancosaminyl acetate 、
N-[(2R,3S,4R,6R)-6-(4,10-dihydroxy-5-oxo-7,8-dihydro-6H-anthracen-1-yl)-2-methyl-3-phenylmethoxyoxan-4-yl]-2,2,2-trifluoroacetamide 在
calcium sulfate 、
scandium tris(trifluoromethanesulfonate) 作用下,
以
1,2-二氯乙烷 为溶剂,
反应 3.0h,
以97%的产率得到N-[(2R,3S,4R,6R)-6-[3-[(2S,4S,5S,6S)-4,6-dimethyl-5-phenylmethoxy-4-[(2,2,2-trifluoroacetyl)amino]oxan-2-yl]-4,10-dihydroxy-5-oxo-7,8-dihydro-6H-anthracen-1-yl]-2-methyl-3-phenylmethoxyoxan-4-yl]-2,2,2-trifluoroacetamide