p-nitrobenzyl glyoxylate 、
[(1E,3E)-4-(tert-Butyl-dimethyl-silanyloxy)-buta-1,3-dienyl]-carbamic acid ethyl ester 以
苯 为溶剂,
反应 40.0h,
生成 (2S,3S,6R)-6-(tert-Butyl-dimethyl-silanyloxy)-3-ethoxycarbonylamino-3,6-dihydro-2H-pyran-2-carboxylic acid 4-nitro-benzyl ester 、 (2R,3S,6R)-6-(tert-Butyl-dimethyl-silanyloxy)-3-ethoxycarbonylamino-3,6-dihydro-2H-pyran-2-carboxylic acid 4-nitro-benzyl ester