Effect of carbon chain length on catalytic C O bond cleavage of polyols over Rh-ReOx/ZrO2 in aqueous phase
作者:Achraf Sadier、Noémie Perret、Denilson Da Silva Perez、Michèle Besson、Catherine Pinel
DOI:10.1016/j.apcata.2019.117213
日期:2019.9
-tetraols, -triols, -diols, and hexanols) is achievable by hydrogenolysis of erythritol, xylitol, and sorbitol over supported-bimetallic Rh-ReOx (Re/Rh molar ratio 0.5) catalyst, respectively. After validation of the analytical methodology, the effect of some reaction parameters was studied. In addition to CO bond cleavage by hydrogenolysis, these polyols can undergo parallel reactions such as epimerization
Six new phenylphenalenone derivatives were isolated from unripe banana, Musa acuminata, fruit that had been wounded followed by inoculation with Colletotrichum musae. Absolute configurations of optically active phenylphenalenone derivatives were elucidated by their chemical conversion to L-arabitol pentaacetate. Antifungal activities against C. musae and a biosynthetic pathway of phenylphenalenones are also discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.
Homochiral acetals in organic synthesis. A general enantioselective entry to carbohydrate derivatives from non-carbohydrate precursors
作者:Eugene A. Mash、Jeffrey B. Arterburn、James A. Fryling
DOI:10.1016/s0040-4039(01)93919-x
日期:1989.1
A general chromatographic separation of furanosides and pyranosides derived from esters of lactic acid is disclosed. Application of this separation methodology to rapid syntheses of the diastereomers of (S)-methyl lactyl 4-deoxyribopyranose is described.