作者:Amélia P. Rauter、José A. Figueiredo、Isabel M. Ismael
DOI:10.1016/0008-6215(89)84054-6
日期:1989.6
reaction of 1,2-O-isopropylidene-alpha-D-xylo-5-hexulofuranuronamide (1) with the Wittig reagent ethoxycarbonylmethylenetriphenylphosphorane gave 3-(1,2-O-isopropylidene-beta-L-threofuranos-4-yl)maleimide (2, 15%) and ethyl 5-carbamoyl-5,6-dideoxy-1,2-O-isopropylidene-alpha-D-xylo-hept-5-enof uranuronate (3, 76%), a similar reaction of 3-O-benzyl-1,2-O-isopropylidene-alpha-D-ribo-5-hexulofuranuronamide++
1,2-O-异亚丙基-α-D-xylo-5-hexulofurafurronronamide(1)与Wittig试剂乙氧基羰基亚甲基三苯基磷烷的反应生成了3-(1,2-O-异亚丙基-β-L-苏呋喃基-4-基)马来酰亚胺(2,15%)和5-氨基甲酰基-5,6-二脱氧-1,2-O-异亚丙基-铀铀酸酯(3,76%),类似的反应3-O-苄基-1,2-O-异亚丙基-α-D-核糖-5-己呋喃呋喃酰胺+ +(4)仅产生3-(3-O-苄基-1,2-O-异亚丙基-α-D (2-呋喃呋喃并-4-基)丙二酰亚胺(5),80%)和3-O-苄基-1,2-O-异亚丙基-α-D-二甲苯基-5-六氟呋喃核糖酰胺++ +(6)生成的仅乙基3-O-苄基-5-氨基甲酰基-5,6-二脱氧-1,2-O-异亚丙基-α-D-二甲苯基庚基-5-异呋喃呋喃酸酯(7,85%)。马来酰亚胺环的形成取决于HO-3'的取向和取代。