(S)-[(2S,3R)-5-(3,4-Dimethoxy-phenyl)-2-hydroxy-tetrahydro-furan-3-yl]-hydroxy-acetic acid butyl ester 在
1-Hydroxy-3-(isothiocyanato)-tetrabutyldistannoxane 作用下,
以
甲苯 为溶剂,
生成 (3S,3aR,5R,6aS)-5-(3,4-Dimethoxy-phenyl)-3-hydroxy-tetrahydro-furo[2,3-b]furan-2-one 、 (3S,3aR,5S,6aS)-5-(3,4-Dimethoxy-phenyl)-3-hydroxy-tetrahydro-furo[2,3-b]furan-2-one