(S)-4-((5R,6R)-5-Hydroxy-6-methoxy-4-oxo-tetrahydro-pyran-2-yl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester 、
乙氧甲酰基亚甲基三苯基膦 以
乙腈 为溶剂,
反应 8.0h,
以74%的产率得到(R)-4-{(2S,5R,6S)-4-[1-Ethoxycarbonyl-meth-(E)-ylidene]-5-hydroxy-6-methoxy-tetrahydro-pyran-2-yl}-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester