Thr reactions of 3-O-benzyl-6-deoxy-1, 2-O-isopropylidene-5-O-methanesulfonyl-α-D-gluco- and β-L-idofurnoses (1 and 2) with tetrabutylammonium fluoride in N, N-dimethylformamide gave (E)- and (Z)-3-O-benzyl-5, 6-dideoxy-1, 2-O-isopropylidene-β-L-threo-hex-4-enofuranoses (3 and 4), respectively, as the major products. The structure of the (E)-isomer 3 was determined by single-crystal X-ray analysis. 3-O-Benzyl-5, 6-dideoxy-5-fluoro-1, 2-O-isopropylidene-β-L-ido- and α-D-glucofuranoses (6 and 7) were formed as minor products in the respective reactions.
3-O-苄基-6-脱氧-1,2-O-异亚丙基-5-O-甲磺酰基-α-
D-葡糖和β-L-亚酮(1和2)与
四丁基氟化铵在N、在
N,N-二甲基甲酰胺中,用
四丁基氟化铵分别生成(E)-和(Z)-3-O-苄基-5,6-二脱氧-1,2-O-异亚丙基-β-L-苏-己-4-烯
呋喃糖(3 和 4)作为主要产物。通过单晶 X 射线分析,确定了(E)异构体 3 的结构。3-O-Benzyl-5, 6-dideoxy-5-fluoro-1, 2-O-isopropylidene-β-L-ido- 和 α-D-glucofuranoses(6 和 7)在各自的反应中作为次要产物生成。