Some phosphanyl sugar derivatives, which are analogs of sugars having a phosphorus atom in place of the ring oxygen, were synthesized from 2- and 3-phospholenes as starting materials. Catalytic cis-dihydroxylation of 2-phospholene or 3-phospholene 1-oxide derivatives with osmium(VIII) oxide in the presence of a cooxidant afforded 3-deoxy- or 1-deoxy-tetrofuranose-type phosphanyl sugar derivatives, respectively
摘要以2-和3-膦烯为原料合成了一些膦酰糖衍生物,它们是具有磷原子代替环氧的糖的类似物。在共氧化剂存在下,用氧化((VIII)催化2-膦或3-膦1-氧化物衍生物的顺式-二羟基化,分别得到3-脱氧或1-脱氧-四呋喃糖型膦酰基糖衍生物。4-酰氧基-2-膦-1-氧化物衍生物的顺-二羟基化得到四呋喃糖型膦酰基糖衍生物。使用1 H NMR和X射线晶体学对这些膦酰基糖的衍生物中的一些进行结构分析。1.于1996年7月21日至26日在意大利米兰举行的第十八届国际碳水化合物研讨会上发表。
Theoretical and experimental studies of cycloconjugation involving second-row elements
作者:Gideon Fraenkel、Christopher J. Kolp、Albert Chow
DOI:10.1021/ja00037a040
日期:1992.5
investigate conjugative interactions between second-row elements (S, P) amd a π-electron system, barriers to amide rotation have been measured usingNMR line-shape methods, for N-acetyl-4-X(hetero)-1,4-dihydropyridines (X=SO 2 , 7; P(O)OCH 3 , 13; C(CH 3 ) 2 , 6 (reference)) as well as the dihydro (8a) and tetrahydro (9) derivatives, respectively, of 7
spholene 1-oxides, which were subjected to osmium (VIII) oxide-catalyzed diastereoselective cis-dihydroxylation to give new C-glycoside derivatives of Furanose-type phosphono sugars, with twist conformation.
materials for the syntheses of sugar derivatives having a phosphorus atom in the hemiacetal ring of the sugar derivatives (phosphono sugars). Alkylation or benzyloxymethylation of 3-phospholene 1-oxides afforded phospholene derivatives with more than 5 carbon atoms. Epoxidation followed by epoxide ring opening and cis-dihydroxylation of 5-benzyloxymethyl-2-phospholene derivatives afforded four pentofuranose