Deoxy-nitrosugars. 11th Communication. Reactions of 1-C-nitroglycosyl halides and 1-C-nitroglycosyl sulfones with dialkyl-phosphite anions: Nucleophilic attackvs. single-electron transfer
作者:Roger Meuwly、Andrea Vasella
DOI:10.1002/hlca.19850680426
日期:1985.6.26
Treatment of the chloro-nitro-ribofuranose 7 with KPO(OMe)2 gave the O-amino phosphate 8 (5 %) and the nitrile 9 (62 %). Compound 9 was also obtained by the reaction of 8 with KPO(OMe)2, and its structure was established by X-ray analysis. Treatment of the chloro-nitro-mannofuranose 10, the bromo-nitro-ribofuranose 14, or the bromo-nitro-mannofuranose 16, respectively, with the K or Na salt of HPO(OMe)2
用KPO(OMe)2处理氯-硝基-呋喃核糖7,得到O-氨基磷酸酯8(5%)和腈9(62%)。化合物9还通过8与KPO(OMe)2的反应获得,并且其结构通过X射线分析确定。用HPO(OMe)2的K或Na盐分别处理氯硝基硝基呋喃呋喃糖10,溴硝基硝基呋喃呋喃糖14或溴硝基硝基呋喃呋喃糖16也导致O-氨基磷酸酯和腈。(1- C从氯-硝基-甘露糖呋喃糖10和KPO(OEt)2一起获得-(硝基糖基)膦酸酯22(21%)和腈21(51%)。的1-反应Ç -nitroglycosyl砜25(NO 2 -基内)与KPO(OET)2,得到(1- Ç -nitroglycosyl)膦酸22(61%)和腈21(11%),而异头砜26(NO 2 -基团外)得到22(15%)和21(58%)。在[18] Crown-6的存在下,端基异构体25和26的混合物以67%的产率得到(1- C-硝基糖基)膦酸酯22和21(1