Novel and Efficient Cyclization Procedure for the Synthesis of 2,5-Disubstituted-1,3,4-thiadiazoles Without Using Any Ring-Closing Reagents
摘要:
A novel method for the synthesis of 2,5-disubstituted-1,3,4-thiadiazoles via direct ring closure of 1,6-disubstituted-2,5-dithioureas in dimethylformanide without using any ring-closing reagents has been accidentally discovered. Repeated and extended experiments confirmed that this is a very simple and efficient way to synthesize these kinds of fine chemicals. A series of novel 2,5-disubstituted-1,3,4-thiadiazoles have been synthesized via this method in good yields.
A novel series of 2,5-disubstituted 1,3,4-thiadiazoles as potential anticonvulsant agent
摘要:
In pursuit for better antiepileptic drug and the importance of semicarbazones and 2,5-disubstituted 1,3,4-thiadiazoles as anticonvulsant pharmacophore, a series of novel N-({5-[(6-methyl-1-benzofuran-3-yl)methyl]-1,3,4-thiadiazol-2-yl}carbamothioyl)-2/3/4-substitutedbenzamide were designed, synthesized and evaluated for their anticonvulsant activity. The findings of the present studies confirmed that the pharmacophore model with four binding sites is crucial for anticonvulsant activity. Structure activity relationships among synthesized compounds were also established. (C) 2010 Harish Rajak. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Intramolecular Hydrogen Bonding and Anion Binding of <i>N</i>-Benzamido-<i>N</i>‘-benzoylthioureas
作者:Wen-Xia Liu、Yun-Bao Jiang
DOI:10.1021/jo702159r
日期:2008.2.1
N-acylthiourea is known to be unable to bind anions due to a strong intramolecular hydrogenbond (IHB). We show here that by inserting an amido group in the N‘-phenyl side the newly designed N-benzamido-N‘-benzoylthioureas, despite this IHB too, bind strongly to anions with binding constants on the order of 106−107 mol-1 L. Results suggest that potential anion receptors or organocatalysts could be developed
Quinoline and quinazoline derivatives and drugs containing the same
申请人:——
公开号:US20040132727A1
公开(公告)日:2004-07-08
There are provided compounds which can be used in the treatment of diseases mediated by the autophosphorylation of a PDGF receptor, specifically, compounds which can inhibit neointima formation hypertrophy. The compounds are those represented by formula (I) or pharmacologically acceptable salts or solvates thereof:
1
wherein R
1
and R
2
represent hydrogen, alkyl or the like; R
3
, R
4
, R
5
and R
6
represent hydrogen, halogen, alkyl, alkoxy or the like; R
11
and R
12
represent hydrogen, alkyl, alkylcarbonyl or the like; and A represents any one of formulae (i) to (x), provided that compounds wherein R
3
, R
4
, R
5
and R
6
represent hydrogen and A represents group (v) wherein u is 0 (zero) and R
19
represents phenyl optionally substituted by halogen, alkyl, or alkoxy are excluded.
QUINOLINE AND QUINAZOLINE DERIVATIVES AND DRUGS CONTAINING THE SAME
申请人:KIRIN BEER KABUSHIKI KAISHA
公开号:EP1243582A1
公开(公告)日:2002-09-25
There are provided compounds which can be used in the treatment of diseases mediated by the autophosphorylation of a PDGF receptor, specifically, compounds which can inhibit neointima formation hypertrophy. The compounds are those represented by formula (I) or pharmacologically acceptable salts or solvates thereof:
wherein R1 and R2 represent hydrogen, alkyl or the like; R3, R4, R5, and R6 represent hydrogen, halogen, alkyl, alkoxy or the like; R11 and R12 represent hydrogen, alkyl, alkylcarbonyl or the like; and A represents any one of formulae (i) to (x), provided that compounds wherein R3, R4, R5 and R6 represent hydrogen and A represents group (v) wherein u is 0 (zero) and R19 represents phenyl optionally substituted by halogen, alkyl, or alkoxy are excluded.