(1R,2R,3S)-1-(tert-Butyl-dimethyl-silanyloxy)-3-[(1S,2R)-1,2-diacetoxy-2-((2S,4S,5R)-5-acetoxy-2-methyl-[1,3]dioxan-4-yl)-ethyl]-8-methoxy-1,2,3,4-tetrahydro-naphthalene-2-carboxylic acid ethyl ester 在
potassium carbonate 作用下,
以
甲醇 为溶剂,
生成
(3S,3aS,9S,9aS)-9-(tert-Butyl-dimethyl-silanyloxy)-3-[(R)-hydroxy-((2S,4S,5R)-5-hydroxy-2-methyl-[1,3]dioxan-4-yl)-methyl]-8-methoxy-3a,4,9,9a-tetrahydro-3H-naphtho[2,3-c]furan-1-one