Acetic acid (2R,3R,4S,6S)-2-acetoxymethyl-4-(tert-butyl-dimethyl-silanyloxy)-6-methoxy-tetrahydro-pyran-3-yl ester 在
N-溴代丁二酰亚胺(NBS) 、 4 A molecular sieve 、
四丁基碘化铵 、 zinc(II) iodide 作用下,
以
二氯甲烷 、
1,2-二氯乙烷 为溶剂,
反应 2.5h,
生成
Acetic acid (2R,3R,4S,6S)-2-acetoxymethyl-4-(tert-butyl-dimethyl-silanyloxy)-6-((1R,2R,3R,5S)-2,6,6-trimethyl-bicyclo[3.1.1]hept-3-yloxy)-tetrahydro-pyran-3-yl ester