Photo-oxygenation of polyhydroxyalkyl- and glycosyl-furans: 1,3-dipolar cycloaddition reactions of the products
作者:R. Robles Díaz、F. Garcia Calvo-Flores、L. Alvarez Guardia、F.J. López Aparicio
DOI:10.1016/0008-6215(89)85065-7
日期:1989.8
7,8,9-tetra- O -acetyl-1,3,4-trideoxy- d - arabino -non-3-eno-2,5-diulose ( 3a ), ethyl ( E )-2- C -benzoyl-2,3,4-trideoxy-5,6:7,8-di- O -isopropylidene- d - arabino -oct-2-en-4-ulosonate ( 3b ), ethyl ( E )-5,8-anhydro-2- C -benzoyl-2,3,4-trideoxy-6,7- O -isopropylidene- d - ribo - ( 3c ) and - d - arabino -oct-2-en-4-ulosonate ( 3d ), 2,3-di- O -acetyl-β- d -erythro- ( 4e ) and -α- d -threo-furanosyl
7- O-异亚丙基-d-核糖-(3c)和-d-阿拉伯糖-oct-2-en-4-ulosonate(3d),2,3-二-O-乙酰基-β-d-赤型-(4e )和-α-d-苏-呋喃糖基3-C-乙酰基-4-氧代戊二酸-烯酸酯(4f)和3-C-乙酰基-7,8-二-O-乙酰基-6,9-脱水- 1,3,4-三甲氧基-d-木糖基-非-3-eno-2,5-二糖(3g)。上述γ-二酮和γ-酮酸酯与重氮乙酸甲酯反应,生成5,5-二乙酰基-3-甲氧基羰基-4-(1,2,3,4-四-O-乙酰基-d-阿拉伯糖-四糖醇-1-酰基羰基)-Δ2-吡唑啉(11a),5-苯甲酰基-4-(1,2:3,4-二-O-异丙叉亚基-d-阿拉伯糖-四糖醇-1-基羰基)-5-乙氧基羰基-3-甲氧基羰基-Δ2-吡唑啉(11b),4-(2,5-脱水-3,4- O-异亚丙基-d-核糖基-和-d-阿拉伯糖基)-5-苯甲酰基-5-乙氧基羰基-3-甲氧基羰基-Δ