An Efficient Synthesis of 2-Aminothiophenes via the Gewald Reaction Catalyzed by an N-Methylpiperazine-Functionalized Polyacrylonitrile Fiber
摘要:
A new N-methylpiperazine-functionalized polyacrylonitrile fiber has been developed to catalyze the Gewald reaction between 2,5-dihydroxy-1,4-dithiane and activated nitriles to afford 3-substituted 2-aminothiophenes in good to excellent yields (65-91%). Low catalyst loading (8.0 mol%), simple procedure, high yields, excellent recyclability, and reusability (up to 10 times with minimal loss of catalytic activity) are attractive features of this fiber catalyst.
<i>N</i>-(2-Benzoylphenyl)-<scp>l</scp>-tyrosine PPARγ Agonists. 3. Structure−Activity Relationship and Optimization of the <i>N</i>-Aryl Substituent
作者:Jeff E. Cobb、Steven G. Blanchard、Evan G. Boswell、Kathleen K. Brown、Paul S. Charifson、Joel P. Cooper、Jon L. Collins、Milana Dezube、Brad R. Henke、Emily A. Hull-Ryde、Debra H. Lake、James M. Lenhard、William Oliver,、Jeffery Oplinger、Mila Pentti、Derek J. Parks、Kelli D. Plunket、Wei-Qin Tong
DOI:10.1021/jm980414r
日期:1998.12.1
PPARgamma activity although binding affinity to PPARgamma may be maintained. A particularly promising set of analogues is the anthranilic acidesters 63-66 in which the phenyl ring in the 2-benzoyl group of 1 and 2 has been replaced by an alkoxy group. In particular, (S)-2-(1-carboxy-2- inverted question mark4-[2-(5-methyl-2-phenyloxazol-4-yl)ethoxy]phen yl inverted question mark ethylamino)benzoic acid
Methods for Treating Cognitive Disorders Using Inhibitors of Histone Deacetylase
申请人:Forum Pharmaceuticals, Inc.
公开号:US20170000749A1
公开(公告)日:2017-01-05
This disclosure relates to compounds for the inhibition of histone deacetylase and treatment of a cognitive disorder or deficit. More particularly, the disclosure provides for compounds of formula (I)
wherein
Q, J, L and Z are as defined in the specification.
Thiazole formation through a modified Gewald reaction
作者:Carl J Mallia、Lukas Englert、Gary C Walter、Ian R Baxendale
DOI:10.3762/bjoc.11.98
日期:——
The synthesis of thiazoles and thiophenes starting from nitriles, via a modified Gewald reaction has been studied for a number of different substrates. 1,4-Dithiane-2,5-diol was used as the aldehyde precursor to give either 2-substitutedthiazoles or 2-substituted aminothiophenes depending on the substitution of the alpha-carbon to the cyano group.
Chemoselective generation of acyl phosphates, acylium ion equivalents, from carboxylic acids and an organophosphate ester in the presence of a Brønsted acid
作者:Akinari Sumita、Yuko Otani、Tomohiko Ohwada
DOI:10.1039/c6cc09618b
日期:——
Reactions of an organophosphate ester with carboxylicacids proceeded smoothly and chemoselectively in the presence of a Bronsted acid, affording acyl phosphate intermediates, leading to formation of various functional aromatic ketones.
A method for the treatment of Meniere's disease comprising the administration of a medicament which modulates the IKs channel of the ear and thereby reducing endolymph production.