D-angolosaminyl acetate 、
N-[(2S,3S,4S,6S)-6-(1,9-dihydroxy-8-oxo-6,7-dihydro-5H-anthracen-2-yl)-2,4-dimethyl-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 9.0h,
以98%的产率得到N-[(2S,3S,4S,6S)-6-[4-[(2R,4R,5S,6R)-4-azido-6-methyl-5-phenylmethoxyoxan-2-yl]-1,9-dihydroxy-8-oxo-6,7-dihydro-5H-anthracen-2-yl]-2,4-dimethyl-3-phenylmethoxyoxan-4-yl]-2,2,2-trifluoroacetamide