hexa-O-acetyl-D-lactal 、
5-hydroxy-7-(5-hydroxypentyloxy)-3-(4-hydroxyphenyl)chromen-4-one 在
indium(III) chloride 作用下,
以
乙腈 为溶剂,
反应 2.0h,
以53%的产率得到[(2R,3S,6S)-6-[5-[5-hydroxy-3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxypentoxy]-3-[(2R,3R,4S,5S,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-3,6-dihydro-2H-pyran-2-yl]methyl acetate