SYNTHESIS OF R-GLUCOSIDES, SUGAR ALCOHOLS, REDUCED SUGAR ALCOHOLS, AND FURAN DERIVATIVES OF REDUCED SUGAR ALCOHOLS
申请人:Archer Daniels Midland Company
公开号:US20170121258A1
公开(公告)日:2017-05-04
Disclosed herein are methods for synthesizing 1,2,5,6-hexanetetrol (HTO), 1,6 hexanediol (HDO) and other reduced polyols from C5 and C6 sugar alcohols or R glycosides. The methods include contacting the sugar alcohol or R-glycoside with a copper catalyst, most desirably a Raney copper catalyst with hydrogen for a time, temperature and pressure sufficient to form reduced polyols having 2 to 3 fewer hydoxy groups than the starting material. When the starting compound is a C6 sugar alcohol such as sorbitol or R-glycoside of a C6 sugar such as methyl glucoside, the predominant product is HTO. The same catalyst can be used to further reduce the HTO to HDO.
Selective Monocarbamoylation of Symmetrical Diols with Alkyl Halides and Potassium Cyanate Using Phase-Transfer Catalysis
作者:Mahavir Prashad、John C. Tomesch、William J. Houlihan
DOI:10.1055/s-1990-26910
日期:——
A convenient method for the selective monocarbamoylation of diols by reaction with alkyl isocyanates, generated in situ from alkyl halides and potassium cyanate under phase-transfer catalysis, is described. Under these conditions the ease of reaction shows the following order cis-diols > trans-diols and diols > monoalcohols. An increase in the number of methylene groups between two hydroxyl groups lead to a decrease in product yields. A plausible mechanism to explain these results is proposed.
Reduction in Glucose Levels in STZ Diabetic Rats by 4-(2,2-Dimethyl-1-oxopropyl)benzoic Acid: A Prodrug Approach for Targeting the Liver
作者:Gregory R. Bebernitz、Jeremy G. Dain、Rhonda O. Deems、Dario A. Otero、W. Ronald Simpson、Robert J. Strohschein
DOI:10.1021/jm000264w
日期:2001.2.1
attempts at lowering glucoselevels in vivo with 1 have been associated with toxicity in other organs such as the testes. An approach was developed utilizing the natural processing of triglyceride-like intermediates as a basis for selectively targeting the absorption, processing, and delivery of a prodrug to the liver. Compounds were identified by this method which lowered glucoselevels in vivo without
[EN] POROUS SHAPED METAL-CARBON PRODUCTS<br/>[FR] PRODUITS FAÇONNÉS POREUX À BASE DE CARBONE ET DE MÉTAL
申请人:RENNOVIA INC
公开号:WO2017075425A1
公开(公告)日:2017-05-04
The present invention provides a porous metal-containing carbon-based material that is stable at high temperatures under aqueous conditions. The porous metal-containing carbon-based materials are particularly useful in catalytic applications. Also provided, are methods for making and using porous shaped metal-carbon products prepared from these materials.
Process for the preparation of monoalkylcarbamate group-containing
申请人:Sandoz Pharm. Corp.
公开号:US04868319A1
公开(公告)日:1989-09-19
An improved process for preparing monoalkylcarbamate group-containing compounds comprising reacting a hydroxy group-containing compound with an organic halide and an alkali metal cyanate in the conjoint presence of a phase transfer catalyst and a solvent.