Acetic acid (2R,3R,4S,5S,6R)-3-acetoxy-6-(4-methoxy-benzyloxymethyl)-2-(2-trimethylsilanyl-ethoxy)-5-((2R,3S,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-4-yl ester 在
sodium methylate 作用下,
以96%的产率得到(2R,3R,4R,5R,6R)-6-(4-Methoxy-benzyloxymethyl)-2-(2-trimethylsilanyl-ethoxy)-5-((2R,3S,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-3,4-diol