重氮甲烷 、
(4-Methoxy-benzyloxy)-acetic acid (2R,3S,4R)-2-(tert-butyl-diphenyl-silanyloxymethyl)-4-[2-(4-methoxy-benzyloxy)-acetoxy]-5-methyl-3,4-dihydro-2H-pyran-3-yl ester 在
吡啶 、
三甲基氯硅烷 、
lithium hexamethyldisilazane 作用下,
以
吡啶 为溶剂,
生成 (S)-{(2R,5S,6R)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-5-[2-(4-methoxy-benzyloxy)-acetoxy]-3-methyl-5,6-dihydro-2H-pyran-2-yl}-(4-methoxy-benzyloxy)-acetic acid methyl ester 、 (R)-{(2R,5S,6R)-6-(tert-Butyl-diphenyl-silanyloxymethyl)-5-[2-(4-methoxy-benzyloxy)-acetoxy]-3-methyl-5,6-dihydro-2H-pyran-2-yl}-(4-methoxy-benzyloxy)-acetic acid methyl ester