[EN] FORMATION OF TETRA-SUBSTITUTED ENAMIDES AND STEREOSELECTIVE REDUCTION THEREOF [FR] FORMATION D'ENAMIDES TETRA-SUBSTITUES ET REDUCTION STEREOSELECTIVE DE CES DERNIERS
[EN] FORMATION OF TETRA-SUBSTITUTED ENAMIDES AND STEREOSELECTIVE REDUCTION THEREOF [FR] FORMATION D'ENAMIDES TETRA-SUBSTITUES ET REDUCTION STEREOSELECTIVE DE CES DERNIERS
Ligand-Free Palladium-Catalyzed Cyanation of Aryl Halides
作者:Steven A. Weissman、Daniel Zewge、Cheng Chen
DOI:10.1021/jo0481250
日期:2005.2.1
A practical, ligand-free cyanation of aryl bromides that utilizes as little as 0.1 mol % Pd(OAc)2 in combination with a nontoxic cyanide source, M4[Fe(CN)6] (M = K, Na), is described. The reactions are performed in DMAC at 120 °C and provide the corresponding aryl nitrile in 83−96% yield, typically in less than 5 h. TON values of up to 7100 were attained.
A practical, ligand-free cyanation of aryl bromides employs Pd catalyst in combination with a non-toxic cyanide source, M
n
[Fe(CN)
6
] (M=K or Na; n is 3 or 4), or a hydrate thereof, and a base. The reactions are performed in a polar aprotic solvents and provide the corresponding aryl nitrile in 83-96% yield, typically in less than 5 h.
Formation of Tetra-Substituted Enamides and Stereoselective Reduction Thereof
申请人:Campos Kevin R.
公开号:US20090018340A1
公开(公告)日:2009-01-15
The present invention is directed to a practical process for the preparation of an enamide (II) by palladium catalyzed coupling of a primary amide (IV) with a compound of structural formula (III), as shown below: As well as to crystalline forms of a compound produced by this process, in particular, an anhydrous crystal form, Form B, and crystalline solvates falling into three patterns, Type 1, Type 2, and Type 3, and crystalline intermediate compounds produced in the process. Still further, the present invention relates to the stereoselective reduction of the tetrasubstituted enamide (II) to the corresponding amide (I).
FORMATION OF TETRA-SUBSTITUTED ENAMIDES AND STEREOSELECTIVE REDUCTION THEREOF
申请人:CAMPOS KEVIN R.
公开号:US20100041893A1
公开(公告)日:2010-02-18
The present invention is directed to a practical process for the preparation of an enamide (II) by palladium catalyzed coupling of a primary amide (IV) with a compound of structural formula (III), as shown below: As well as to crystalline forms of a compound produced by this process, in particular, an anhydrous crystal form, Form B, and crystalline solvates falling into three patterns, Type 1, Type 2, and Type 3, and crystalline intermediate compounds produced in the process. Still further, the present invention relates to the stereoselective reduction of the tetrasubstituted enamide (II) to the corresponding amide (I).
Combination of a Dipeptidyl Peptidase-IV Inhibitor and a Cannabinoid CB1 Receptor Antagonist for the Treatment of Diabetes and Obesity
申请人:Amatruda John M.
公开号:US20090306037A1
公开(公告)日:2009-12-10
The present invention relates to pharmaceutical compositions comprising a combination of a particular dipeptidyl peptidase-IV (DPP-IV) inhibitor and a particular cannabinoid CB?1#191 receptor antagonist/inverse agonist, kits containing such combinations and methods of using such compositions for the treatment of diabetes, diabetes associated with obesity, diabetes-related disorders, obesity, and obesity-related disorders.