N-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)isatine 、
1-苯并噻吩-3(2H)-酮 在
sodium acetate 、
乙酸酐 、
溶剂黄146 作用下,
反应 1.0h,
以93%的产率得到(2R,3S,4S,5R,6R)-2-(acetoxymethyl)-6-((Z)-2-oxo-3-(3-oxobenzo[b]thiophen-2(3H)-ylidene)indolin-1-yl)tetrahydro-2H-pyran-3,4,5-triyl triacetate