Dienophilicity of Imidazole in Inverse Electron Demand Diels−Alder Reactions. 4. Intermolecular Reactions with 1,2,4-Triazines
作者:Brian R. Lahue、Zhao-Kui Wan、John K. Snyder
DOI:10.1021/jo030049y
日期:2003.5.1
cycloadditions of 2-substituted imidazoles with various 1,2,4-triazines produced both imidazo[4,5-c]pyridines (3-deazapurines) and pyrido[3,2-d]pyrimid-4-ones (8-deazapteridines). The product distribution was controlled by reactant substituents and influenced by reaction temperature. A regioselective method for the preparation of 6-unsubstituted 1,2,4-triazines was also developed. By using this route to 8-deazapteridines
Heteroaromatic compounds having sphingosine-1-phosphate (S1P) receptor agonist biological activity
申请人:Allergan, Inc.
公开号:US07728014B2
公开(公告)日:2010-06-01
A novel compound having agonist activity at the S1P3 receptor which is represented by the formula I
wherein
X is selected from the group consisting of CR3, N and NO;
Y is selected from the group consisting of CR3, N and NO;
Z is selected from the group consisting of CR3, N and NO;
and at least one of X, Y and Z is N or NO;
V is O or NOR4
R1 is an aryl group;
R2 is an aryl group;
R3 is selected from the group consisting of H and alkyl; and 2 of said R3 groups may together form a cyclic alkyl ring having from 3 to 6 carbon atoms;
R4 is selected from the group consisting of H and alkyl;
a is 0 or an integer of from 1 to 6;
b is 0 or 1;
c is 0 or 1;
f is 0 or an integer of 1 or 2;
x is 0 or 1;
y is 0 or an integer of from 1 to 3; and
z is 0 or an integer of from 1 to 3.
Diels-alder reactions of 1,2,4-triazines with cyclic vinyl ethers
作者:António M.d'A. Rocha Gonsalves、Teresa M.V.D. Pinhoe Melo、Thomas L. Gilchrist
DOI:10.1016/s0040-4020(01)82377-2
日期:1993.6
Hoyer; Gompper, Chemische Berichte, 1959, vol. 92, p. 564
作者:Hoyer、Gompper
DOI:——
日期:——
Synthesis of isoquinolines by cycloaddition of arynes to 1,2,4-triazines
作者:António M.d'A.Rocha Gonsalves、Teresa M.V.D. Pinho e Melo、Thomas L. Gilchrist
DOI:10.1016/s0040-4020(01)89873-2
日期:1992.1
Benzyne has been generated from benzenediazonium-2-carboxylate in the presence of several 1,2,4-triazines 1 and isoquinolines 2 have been isolated in moderate yield. 1-Aminobenzotriazole was also used as the source of benzyne and isoquinolines were again isolated in moderate yield from these reactions. 4-Methylbenzyne, which was generated from 5-methylanthranilic acid, reacted unselectively with the triazines to give mixtures of 6- and 7-methylisoquinolines 3 and 4 On the other hand reactions of 3-methylbenzyne with the triazines 1d and 1e procceded with high regioselectivity, giving only the 5-methylisoquinoline 5a and the 8-methylisoquinoline 6b, respectively.