Selective Esterification of 1,4:3,6-Dianhydro-D-glucitol
作者:Živorad Čeković、Zorana Tokić
DOI:10.1055/s-1989-27332
日期:——
Esterification of 1,4:3,6-dianhydro-D-glucitol (1) with carboxcylic acids in the presence of 4-dimethylaminopyridine and dicyclohexylcar- bodiimide affords 2-exo-acylates 3 with high regioselectivity, in addition to small amounts of the isomeric 5-endo-acylates 4 and 2,5-diacylates 5.
Bei dem Verfahren zur Herstellung von isosorbid-5-nitrat wird Isosorbid mit einer aliphatischen Carbonsäure unter Bildung eines Acylierungsgemisches umgesetzt, das Acylierungsgemisch wird anschließend nitriert und das erhaltene Nitrierungsgemisch zur Abspaltung der Acylgruppen hydrolysiert und/oder umgeestert.
COMPOSITION AND METHODS FOR IMPROVING SKIN APPEARANCE
申请人:Sytheon Ltd.
公开号:EP2498772A2
公开(公告)日:2012-09-19
Method for the Surface Treatment of a Metallic or Fibrous Material
申请人:Mentink Leon
公开号:US20080191171A1
公开(公告)日:2008-08-14
The invention relates to a surface treatment method, in which a material other than the human body, which is selected from metallic materials and fibrous materials, is brought into contact with a composition comprising at least one dianhydrohexitol ether (compound A). The dianhydrohexitol ether can be associated with a compound B which is selected from among solubilising agents, acid agents and alkaline agents. The fibrous material to undergo surface treatment is chosen from the following materials in particular, namely: wood materials, vegetable materials, paper materials and textile materials.
Method For the Treatment of a Material Other Than the Human Body
申请人:Mentink Leon
公开号:US20080191164A1
公开(公告)日:2008-08-14
The invention relates to a method for the treatment of material other than the human body, in which the material to be treated is mixed or brought into contact with a composition comprising: a) at least one compound A which is selected from dianhydrohexitol ethers, preferably dimethyl isosorbide; and b) at least one compound B which is selected from alkaline agents, acid agents and solubilising agents which are chosen from among liquid fatty alcohols at 25° C. other than isostearylic alcohol, non-fatty alcohols, terpenic compounds, aldehydes, ketones, fluoro compounds, sulphur compounds, ethers, esters and supercritical fluids.