Chiral diphosphorus compounds and their transition metal complexes
申请人:Meseguer Benjamin
公开号:US20050080047A1
公开(公告)日:2005-04-14
The present invention relates to chiral diphosphorus compounds and their transition metal complexes, to a process for preparing chiral diphosphorus compounds and their transition metal complexes and also to their use in asymmetric syntheses.
CONVERSION OF CARBOHYDRATES TO HYDROXYMETHYLFURFURAL (HMF) AND DERIVATIVES
申请人:SANBORN Alexandra J.
公开号:US20090156841A1
公开(公告)日:2009-06-18
A method of producing substantially pure HMF, HMF esters and other derivatives from a carbohydrate source by contacting the carbohydrate source with a solid phase catalyst. A carbohydrate starting material is heated in a solvent in a column and continuously flowed through a solid phase catalyst in the presence of an organic acid, or heated with the organic acid and a solid catalyst in solution to form a HMF ester. Heating without organic acid forms HMF. The resulting product is purified by filtration to remove the unreacted starting materials and catalyst. The HMF ester or a mixture of HMF and HMF ester may then be oxidized to 2,5-furandicarboxylic acid (FDCA) by combining the HMF ester with an organic acid, cobalt acetate, manganese acetate and sodium bromide under pressure. Alternatively, the HMF ester may be reduced to form a furan or tetrahydrofuran diol.
Chirale Diphosphorverbindungen und deren Übergangsmetallkomplex
申请人:Bayer Chemicals AG
公开号:EP1400527A1
公开(公告)日:2004-03-24
Die vorliegende Erfindung betrifft chirale Diphosphorverbindungen und deren Übergangsmetallkomplexe, ein Verfahren zur Herstellung chiraler Diphosphorverbindungen und deren Übergangsmetallkomplexe sowie deren Verwendung in asymmetrischen Synthesen.
申请人:Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
公开号:US10588962B2
公开(公告)日:2020-03-17
The present invention relates to the field of synthesizing and biologically evaluating of a novel class of carbohydrate-based vaccines. The new vaccines consist of a multi-modular structure which allows applying the vaccine to a whole variety of pathogenes. This method allows preparing vaccines against all pathogens expressing immunogenic carbohydrate antigens. As conjugation of antigenic carbohydrates to proteins is not required the conjugate vaccine is particularly heat stable. No refrigeration is required, a major drawback of protein-based vaccines.
Chiral monophosphorus compounds and their transition metal complexes
申请人:——
公开号:US20040127430A1
公开(公告)日:2004-07-01
The present invention relates to chiral monophosphorus compounds and their transition metal complexes, to a process for preparing chiral monophosphorus compounds and their transition metal complexes and also to their use in asymmetric syntheses.