Various kinds of ethyl pyruvate 2-(2-substituted phenyl)hydrazones (1) were subjected to Fischer indolization with acid catalysts. All the phenylhydrazones gave corresponding normal 7-substituted indoles (2). In addition, phenyl-hydrazones whose ortho-substituent is electron-donative or has a central atom with an unshared electron pair tended to give the 4- or 5-substituted indole (3), which was produced by migration of the ortho-substituent during cyclization, whereas those whose ortho-substituent is electron-attractive tended to give little or no such abnormal product. The kind of acid catalyst used had some effect on the yield ratio of products but not on the kind of products.
Indoline analogs of idazoxan: potent .alpha.2-antagonists and .alpha.1-agonists
作者:Gay P. Fagan、Christopher B. Chapleo、Anthony C. Lane、Malcolm Myers、Alan G. Roach、Colin F. C. Smith、Michael R. Stillings、Anthony P. Welbourn
DOI:10.1021/jm00400a009
日期:1988.5
The synthesis and alpha-adrenergic activity of a series of substituted 2-imidazolinylindolines are described. Substitution in the indoline ring generated compounds with a spectrum of adrenoceptor antagonist/agonist profiles that proved sensitive to both the nature and position of the substituent. Many of the derivatives possess greater presynaptic antagonist potency than the corresponding benzodioxan 1, dihydrobenzofuran 2, and indan 3 analogues; however, this alpha 2-antagonism is often accompanied by alpha 1-agonist activity. It was not possible to separate alpha 2-antagonist from alpha 1-agonist properties in this series. Compounds of most interest proved to be the N-ethyl 6, 5-chloro-N-methyl 18, and 5-chloro-N-ethyl 23 derivatives, all being potent alpha 2-antagonists and alpha 1-agonists. Substitution at the 4- and 7-position of the indoline ring generally gave compounds with nonselective agonist properties.
Hewitt, Journal of the Chemical Society, 1893, vol. 63, p. 871
作者:Hewitt
DOI:——
日期:——
N-Benzylindole-2-carboxylic acids: potent functional antagonists of the CCR2b chemokine receptor
作者:Jason G. Kettle、Alan W. Faull、Andy J. Barker、D.Huw Davies、Michael A. Stone
DOI:10.1016/j.bmcl.2003.10.049
日期:2004.1
Screening of the corporate database led to the discovery of a novel series of N-benzylindole-2-carboxylic acid CCR2b chemokine receptor antagonists. These compounds demonstrate high affinity and functional inhibition of the CCR2b receptor. A discussion of the structure-activity relationships is presented, together with evidence for a highly selective receptor binding profile. (C) 2003 Elsevier Ltd. All rights reserved.