Regiospecific synthesis of 3-alkyl-4-hydroxybenzimidazoles as intermediates for an expedient approach to potent EP3 receptor antagonists
摘要:
Regiospecific construction of 3-alkyl-4-hydroxybenzimidazoles is detailed. The synthetic route involves a novel O- to N-acyl transfer reaction to address the observed exclusive O-acylation of 2-amino-3-nitrophenol starting material. This efficient route provides the targeted 3-alkyl-4-hydroxybenzimidazoles in good yields, in five steps, without the use of chromatographic purification. These key intermediates were subsequently elaborated, as shown, to provide acylsulfonamide-derived potent EP3 receptor antagonists. (C) 2010 Elsevier Ltd. All rights reserved.
Regiospecific synthesis of 3-alkyl-4-hydroxybenzimidazoles as intermediates for an expedient approach to potent EP3 receptor antagonists
摘要:
Regiospecific construction of 3-alkyl-4-hydroxybenzimidazoles is detailed. The synthetic route involves a novel O- to N-acyl transfer reaction to address the observed exclusive O-acylation of 2-amino-3-nitrophenol starting material. This efficient route provides the targeted 3-alkyl-4-hydroxybenzimidazoles in good yields, in five steps, without the use of chromatographic purification. These key intermediates were subsequently elaborated, as shown, to provide acylsulfonamide-derived potent EP3 receptor antagonists. (C) 2010 Elsevier Ltd. All rights reserved.
Sulfonamide peri-substituted bicyclics for occlusive artery disease
申请人:Singh Jasbir
公开号:US20060079520A1
公开(公告)日:2006-04-13
Acyl sulfonamide, peri-substituted, fused bicyclic ring compounds useful for the treatment or prophylaxis of a prostaglandin-mediated disease or condition are disclosed. The compounds are of the general formula
A representative example is:
Carboxylic acid peri-substituted bicyclics for occlusive artery disease
申请人:Singh Jasbir
公开号:US20060142355A1
公开(公告)日:2006-06-29
Peri-substituted, fused bicyclic ring carboxylic acids useful for the treatment or prophylaxis of a prostaglandin-mediated disease or condition are disclosed. The compounds are of the general formula
A representative example is:
SULFONAMIDE PERI-SUBSTITUTED BICYCLICS FOR OCCLUSIVE ARTERY DISEASE
申请人:Singh Jasbir
公开号:US20090291948A1
公开(公告)日:2009-11-26
Acyl sulfonamide, peri-substituted, fused bicyclic ring compounds useful for the treatment or prophylaxis of a prostaglandin-mediated disease or condition are disclosed. The compounds are of the general formula
A representative example is: