专利号:US-6242602-B1 优先权日:1999-03-29 标 题:One pot synthesis of 5,10-dihydrophenazine compounds and 5,10-substituted dihydrophenazines 发明人:GIRI PUNAM; BYKER HARLAN J; BAUMANN KELVIN L 权利人:GENTEX CORP 摘要:Dihydrophenazines and bis(dihydrophenazines) are prepared in high yield under commercially viable reaction conditions by reacting a catechol with a 1,2-diaminoaryl compound, wherein either the catechol or the 1,2-diaminoaryl compound is provided in at least 50% molar stoichiometric excess. The product may be oxidized to the corresponding phenazine, but is preferably derivatized at one or both of the 5,10-positions to form a monosubstituted or disubstituted dihydrophenazine or bis(dihydrophenazine). Most preferably, 5,10-dialkyl-5,10-dihydrophenazines are prepared starting from catechol and 1,2-diaminoaryl compound in a one pot synthesis. The products are useful as dyes, and in particular as chromophores in electrochromic systems.
专利号:US-10150745-B2 优先权日:2015-03-24 标 题:Process for the preparation of clobazam and its intermediate 发明人:JAGTAP ASHUTOSH; GHARPURE MILIND; SHINDE NAVNATH; PATIL NAVNATH; SHAH CHIRAG; RAUT CHANGDEV; KRISHNMURTHY DHILEEPKUMAR 权利人:PIRAMAL ENTPR LTD 摘要:The present invention provides an improved process for the preparation of 8-chloro-1-phenyl-1H-benzo[b][1,4]diazepine-2,4(3H,5H)-dione (hereafter referred to as the compound (IV)), which is useful as a key intermediate for the synthesis of Clobazam (referred to as the compound (I)) 7-chloro-1-methyl-5-phenyl-1H-benzo[b][1,4]diazepine-2,4(3H,5H)-dione. The process of the present invention further involves transformation of the compound (IV) into Clobazam (I), comprising (a) reacting the compound (II) (as described herein) with monoalkyl malonate in the presence of a coupling agent to obtain the compound (III) (as described herein); followed by the cyclization using a base; (b) reacting the compound-IV (as described herein) obtained from step (a) with methylating agent. The process of the present invention involves formation of novel intermediates methyl 3-((4-chloro-2-(phenylamino)phenyl)amino)-3-oxopropanoate (IIIa) and 3-((4-chloro-2-(phenylamino)phenyl)amino)-3-oxopropanoic acid (V).
专利号:US-3681297-A 优先权日:1970-11-10 标 题 :Synthesis of polybenzothiazolines and polybenzothiazoles by reacting a dialdehyde with an aromatic bis-mercaptoamine 发明人:ALELIO GAETANO FRANCIS D 权利人:GAETANO FRANCIS D ALELIO 摘要:THIS INVENTION DEALS WITH A NOVEL, RELATIVELY SIMPLE PROCESS OF PREPARING POLYBENZOTHIAZOLINES, ((-NH-CH(-)-S-)>AR<(-NH-CH(-Z(-))-S-))N BY REACTING DIALDEHYDES, Z-(CH=O)2, AND (HS)2-AR(-NH2)2 IN A SOLVENT IN AN INERT ATMOSPHERE AND THEREAFTER OXIDIZING THE POLYBENZOTHIAZOLINES TO POLYBENZOTHIAZOLES, ((-N=C(-)-S-)>AR<(-N=C(-Z(-))-S-))N WHEREIN AR REPRESENTS A TETRAVALENT AROMATIC MOIETY IN WHICH THE NITROGEN AND SULFUR ATOMS IN EACH PAIR ARE DISPOSED ORTHO TO EACH OTHER AND Z REPRESENTS A DIVALENT HYDROCARBON MOIETY AS THE RESIDUE OF THE DIALDEHYDE, Z(CHO)2. NEW TYPES, AS WELL AS THE KNOW TYPES OF POLYBENZOTHIAZOLES HAVE BEEN PREPARED BY THIS PROCESS.
专利号:US-2013102730-A1 优先权日:2010-04-02 标 题:Polyamine-containing polymers and methods of synthesis and use 发明人:JOST ROBERT W; ULUDAG HASAN; BOLUK MEHMET YAMAN 权利人:JOST ROBERT W; ULUDAG HASAN; BOLUK MEHMET YAMAN; ALBERTA INNOVATES TECHNOLOGY FUTURES 摘要:The present invention relates to polyamine-containing polymers and methods of their synthesis and use. The polymer may be hydroxyethylcellulose, dextran, poly(vinyl alcohol) or poly(methyl acrylate).
专利号:US-8362019-B2 优先权日:2008-02-01 标 题:Synthesis and anti-proliferative effect of substituted imidazo[4,5-b]pyrazine compounds 发明人:WINFIELD LEYTE L 权利人:SPELMAN COLLEGE; WINFIELD LEYTE L 摘要:This invention provides for compounds, compositions, and methods that involve anti-proliferative and anti-neoplastic activity in cancer cells. In particular, a series of benzimidazole, purine, imidazopyridine, and imidazopyrizine compounds having selected substitution patterns are disclosed, and the activity of various subject compounds is demonstrated. In particular, the disclosure provides for substituted imidazo[4,5-b]pyrazine compounds having the general formula n ntheir salts, pharmaceutical compositions, and methods of treatment using the subject compounds and compositions.
专利号:CN-108435224-B 优先权日:2018-06-22 标 题:Preparation of Hafnium-Carbon Catalyst and Its Application in Parallel Synthesis of Benzimidazole
摘要:Irudayanathan, F. M.; Lee, S., Science of Synthesis Knowledge Updates, (2019) 2, 19. 摘要:Irudayanathan, F. M.; Lee, S., Science of Synthesis Knowledge Updates, (2019) 2, 17. 摘要:Irudayanathan, F. M.; Lee, S., Science of Synthesis Knowledge Updates, (2019) 2, 28.