Toluene-4-sulfonic acid (2R,3S,4S,6S)-4-tert-butoxycarbonylamino-3-hydroxy-6-methoxy-4-methyl-tetrahydro-pyran-2-ylmethyl ester 在
sodium tetrahydroborate 作用下,
以
二甲基亚砜 为溶剂,
以89%的产率得到((2R,3S,4S,6S)-3-Hydroxy-6-methoxy-2,4-dimethyl-tetrahydro-pyran-4-yl)-carbamic acid tert-butyl ester