This invention aims at providing a catalyst for producing an optically active aldehyde or an optically active ketone, which is an optically active carbonyl compound, by carrying out selective asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, particularly a catalyst which is insoluble in a reaction mixture for obtaining optically active citronellal which is useful as a flavor or fragrance, by carrying out selective asymmetric hydrogenation of citral, geranial or neral; and a method for producing a corresponding optically active carbonyl compound. The invention relates to a catalyst for asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, which comprises a powder of at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table, or a metal-supported substance in which at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table is supported on a support, an optically active cyclic nitrogen-containing compound and an acid.
[EN] PROCESS FOR THE PREPARATION OF DARUNAVIR AND DARUNAVIR INTERMEDIATES<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE DARUNAVIR ET D'INTERMÉDIAIRES DE DARUNAVIR
申请人:MAPI PHARMA HK LTD
公开号:WO2011092687A1
公开(公告)日:2011-08-04
The present invention relates to a process for the preparation of darunavir, a nonpeptide protease inhibitor (PI), useful for the treatment of HIV/AIDS patients harboring multidrug-resistant HIV-1 variants that do not respond to previously existing HAART regimens. The present invention further relates to processes for the stereo-directed preparation of darunavir intermediates, in particular (3R,3aS,6aR)-hexahydrofuro [2,3-b] furan-3-ol and to certain novel intermediates obtained by such processes.
PROCESS FOR THE PREPARATION OF DARUNAVIR AND DARUNAVIR INTERMEDIATES
申请人:Mizhiritskii Michael
公开号:US20120296101A1
公开(公告)日:2012-11-22
The present invention relates to a process for the preparation of darunavir, a nonpeptide protease inhibitor (PI), useful for the treatment of HIV/AIDS patients harboring multidrug-resistant HIV-1 variants that do not respond to previously existing HAART regimens. The present invention further relates to processes for the stereo-directed preparation of darunavir intermediates, in particular (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-ol and to certain novel intermediates obtained by such processes.
Chiral proline amide/amine ligands (2, 3), synthesized by multi-step reaction starting from L-proline (1), were evaluated as catalyst generated in situ from [RuCl2(p-cymene)](2) for asymmetric transfer hydrogenation of aromatic ketones in the presence of sodium formiate and sodium dodecyl sulfate (SDS). The results revealed that efficiencies and enantioselectivities strongly depend on the N-substituents. (C) 2014 Elsevier B.V. All rights reserved.