Dratovsky, M.; Dvorakova, E.; Rytir, Z., Acta Chimica Academiae Scientiarum Hungaricae, 1982, vol. 110, # 2, p. 175 - 182
摘要:
DOI:
作为产物:
描述:
Li (H4 I O6) (H2 O) 以
neat (no solvent) 为溶剂,
生成 高碘酸锂二水合物
参考文献:
名称:
Li2H4I2O10, das erste Tetrahydrogendimesoperiodat
摘要:
AbstractLi2H4I2O10 wurde als Zwischenstufe während der Entwässerung von LiH4IO6 · H2O zu LiIO4 erstmals erhalten. Nach der Röntgenstrukturanalyse (monoklin, P21/n, a = 533,98(4), b = 471,85(4), c = 1431,48(10) pm, β = 91,614(7)°, Z = 2, 726 unabhängige Reflexe, R = 0,056) liegt das bisher unbekannte Tetrahydrogendimesoperiodatanion H4I2O102− in Form zweier kantenverknüpfter IO6‐Oktaeder vor, die ihrerseits mit LiO6‐Oktaedern kanten‐ und eckenverknüpft sind. Die Kristalle sind systematisch verzwillingt. Es handelt sich um monokline Ebenenzwillinge nach (100).
Synthesis and Partial Biological Evaluation of a Small Library of Differentially-Linked β-C-Disaccharides1
摘要:
The synthesis of a small library of differentially-linked beta-C-disaccharides has been carried out through the use of a radical allylation-RCM strategy. Acids 6 were prepared by Keck allylation of a suitable carbohydrate-based radical precursor, followed by oxidative cleavage of the formed alkene. Dehydrative coupling of these acids with the known olefin alcohol 5 then gave the precursor esters 7 in excellent yield. Methylenation of the esters 7 was followed by RCM and in situ hydroboration-oxidation of the formed glycals to furnish the protected beta-C-disaccharides 10 in good overall yield. Five examples were then deprotected and screened for their efficacy as enzyme inhibitors of beta-glycosidase and against several solid-tumor cell lines for in vitro differential cytotoxicity.