High-Yield Synthesis of Novel Imidazoles and Triazoles from Alcohols and Phenols
作者:Vincent C. O. Njar
DOI:10.1055/s-2000-8722
日期:——
A variety of alcohols and phenols are converted into their corresponding imidazoles and triazoles in high yields by a facile reaction with N,N 1-carbonyldiimidazole (CDI) or N,N 1-carbonylditriazole (CDT) in acetonitrile. The reactions of allylic alcohols, enols and phenols with CDI or CDT are unprecedented. Evidence is provided which suggests that the reaction with alcohols proceeds via the corresponding carbamates by an SNi mechanism.
The Reaction of Carbonyldiimidazole with Alcohols to Form Carbamates and<i>N-</i>Alkylimidazoles
作者:Jonathan L. Vennerstrom、Yuanqing Tang、Yuxiang Dong
DOI:10.1055/s-2004-831215
日期:——
The reactions of non-benzylic primary and secondary aliphatic alcohols with carbonyldiimidazole (CDI) afford the corresponding carbamates but not N-alkylimidazoles. For benzylic primary alcohols, formation of N-alkylimidazoles proceeds reasonably at 170 °C in several different solvents and occurs by way of the initially formed carbamate. However, under these rather forcing conditions, or even at lower
1-Substituted-imidazoles of the formula: ##STR1## in which A is selected from the group consisting of straight or branched, saturated or unsaturated, acyclic hydrocarbon radicals of from 1 to 3 carbon atoms and R is ##STR2## wherein n is an integer which is at least 1, and the or each Q substituent, which when n is greater than 1 may be the same or different, is selected from a saturated alkyl group of from 1 to 4 carbon atoms or an unsaturated alkyl group of from 2 to 4 carbon atoms, with the proviso that when A is unsaturated Q may also be selected from alkoxy of from 1 to 4 carbon atoms; halo; trihalomethyl; hydroxy; carboxyl; a salt of such a carboxyl group; carboalkyloxy; carboaryloxy; carboarylalkyloxy; --NR.sup.6 R.sup.7 or --CONR.sup.6 R.sup.7 ; in which R.sup.6 and R.sup.7 may be the same or different and are hydrogen or alkyl of from 1 to 4 carbon atoms; the 1-substituted-imidazole being the free base or an acid addition salt thereof. Methods of preparing the 1-substituted-imidazoles are also provided. The imidazoles have pharmacological properties that make them of use in the treatment of thromboembolic disorders, shock and angina pectoris.
Imidazole derivatives for treating myocardial infarction
申请人:Burroughs Wellcome Co.
公开号:US04405634A1
公开(公告)日:1983-09-20
1-Substituted-imidazoles of the formula: ##STR1## in which A is selected from the group consisting of straight or branched, saturated or unsaturated, acyclic hydrocarbon radicals of from 1 to 3 carbon atoms and R is ##STR2## wherein n is an integer which is at least 1, and the or each Q substituent, which when n is greater than 1 may be the same or different, is selected from a saturated alkyl group of from 1 to 4 carbon atoms or an unsaturated alkyl group of from 2 to 4 carbon atoms, with the proviso that when A is unsaturated Q may also be selected from alkoxy of from 1 to 4 carbon atoms; halo; trihalomethyl; hydroxy; carboxyl; a salt of such a carboxyl group; carboalkyloxy; carboaryloxy; carboarylalkyloxy; --NR.sup.6 R.sup.7 or --CONR.sup.6 R.sup.7 ; in which R.sup.6 and R.sup.7 may be the same or different and are hydrogen or alkyl of from 1 to 4 carbon atoms; the 1-substituted-imidazole being the free base or an acid addition salt thereof. Methods of preparing the 1-substituted-imidazoles are also provided. The imidazoles have pharmacological properties that make them of use in the treatment of thromboembolic disorders, shock and angina pectoris.
1-[3-(2,4-Dichlorophenyl)propyl]imidazole and salts thereof
申请人:Burroughs Wellcome Co.
公开号:US04431815A1
公开(公告)日:1984-02-14
A method for (i) the treatment or prophylaxis of a thrombo-embolic disorder of a mammal or a mammalian tissue (ii) the prevention, treatment or prophylaxis of angina pectoris, or (iii) the prevention or delay of the onset of shock, which comprises the administration to the mammal or mammalian tissue of a non-toxic, effective amount of an imidazole of the formula: ##STR1## in which A is a straight or branched, saturated or unsaturated acyclic hydrocarbon radical of from 1 to 3 carbon atoms, n is 0 or 1, and R is ##STR2## wherein m is 0 or an integer which is at least 1 and the or each Q substituent, which, when m is greater than 1 may be the same or different is selected from a saturated or unsaturated hydrocarbon group of from 1 to 4 carbon atoms; alkoxy of from 1 to 4 carbon atoms; nitro; phenyl; acyloxy; halo; trihalomethyl; hydroxy; carboxyl; a salt of such a carboxyl group; carboalkyloxy; carboaryloxy; carboarylalkyloxy; --NR.sup.6 R.sup.7 and --CONR.sup.6 R.sup.7, in which R.sup.6 and R.sup.7 may be the same or different and are each hydrogen or alkyl of from 1 to 4 carbon atoms; the imidazole being the free base or a pharmaceutically acceptable salt thereof. Pharmaceutical formulations of some inidazoles within the class suitable for use in the method of treatment are also novel. Methods of preparing the imidazoles are provided.