Synthesis of fused bicyclic imidazoles by ring-closing metathesis
摘要:
The preparation of a number of dienylimidazole via chemoselective metal-halogen exchange and their utility in ring-closing metathesis is described. Essentially all regioisomeric permutations participate in metathesis with the notable exception of 4-vinyl-5-allylimidazoles, provided that the imidazole N3 atom is protonated. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of fused bicyclic imidazoles by ring-closing metathesis
摘要:
The preparation of a number of dienylimidazole via chemoselective metal-halogen exchange and their utility in ring-closing metathesis is described. Essentially all regioisomeric permutations participate in metathesis with the notable exception of 4-vinyl-5-allylimidazoles, provided that the imidazole N3 atom is protonated. (C) 2003 Elsevier Science Ltd. All rights reserved.
In the adhesion of metallic materials to polymers, new adhesive agents of nitrogen containing hetrocyclic polymers such as compositions of imidazole-pyrridine, pyrrolidone-pyridine, and imidazole-pyrrolidone solutions have been discovered as useful. These agents also exhibit anti-corrosion effects. Adhesion and/or reduction of anti-corrosion can be accomplished by pre-coating the metal material with at least one of these agents prior to applying the polymer, or by preblending the polymer with at least one of these agents followed by applying the blend to the metal, under suitable conditions.
Synthesis of fused bicyclic imidazoles by ring-closing metathesis
作者:Yingzhong Chen、H.V.Rasika Dias、Carl J. Lovely
DOI:10.1016/s0040-4039(02)02864-2
日期:2003.2
The preparation of a number of dienylimidazole via chemoselective metal-halogen exchange and their utility in ring-closing metathesis is described. Essentially all regioisomeric permutations participate in metathesis with the notable exception of 4-vinyl-5-allylimidazoles, provided that the imidazole N3 atom is protonated. (C) 2003 Elsevier Science Ltd. All rights reserved.
1-CARBOXY-1-VYNILOXYIMINOAMINOTHIAZOLE CEPHALOSPORING DERIVATIVES AND PROCESS FOR THEIR PREPARATION