(-)-(6S,7aR)-6-(2',3',4',5'-tetra-O-acetyl-β-D-glucopyranosyl)oxy-7,7a-dihydrobenzofuran-2(4H)-one 在
potassium cyanide 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以22%的产率得到Acetic acid (2R,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-((6S,7aS)-2-oxo-2,6,7,7a-tetrahydro-benzofuran-6-yloxy)-tetrahydro-pyran-3-yl ester