Benzoic acid (4aR,6S,7S,8S,8aR)-6-methoxy-2-phenyl-7-(tetrahydro-pyran-2-yloxy)-hexahydro-pyrano[3,2-d][1,3]dioxin-8-yl ester 在
chromium(VI) oxide 、
乙酸酐 作用下,
以
吡啶 为溶剂,
生成 (4aR,6S,7S,8R,8aR)-6-Methoxy-8-methyl-2-phenyl-7-(tetrahydro-pyran-2-yloxy)-hexahydro-pyrano[3,2-d][1,3]dioxin-8-ol