New approaches to polysubstituted pyrroles and pyrrolinones from α-cyanomethyl-β-ketoesters
作者:Ayhan S. Demir、Mustafa Emrullahoglu、Gülben Ardahan
DOI:10.1016/j.tet.2006.10.054
日期:2007.1
efficient, regioselective one-pot synthesis of 5-alkoxy and 5-alkylsulfanylpyrrole-3-carboxylates in high yields via the zinc perchlorate-catalyzed addition of alcohols and thiols to the nitrile carbon of α-cyanomethyl-β-ketoesters followed by annulation. The addition–annulation process is undertaken in aqueous solution to give 4,5-dihydro-5-oxo-1H-pyrrole-3-carboxylates (pyrrolinones) in good yields. These
Process for preparing 1-(4-methanesulfonyl-2-trifluoromethyl-benzyl)-2-methyl-1H-pyrrolo [2,3-B]pyridin-3-yl-acetic acid
申请人:Novartis AG
公开号:US10723735B2
公开(公告)日:2020-07-28
This invention relates to novel processes for synthesizing [1-(4-Methanesulfonyl-2-trifluoromethyl-benzyl)-2-methyl-1H-pyrrolo[2,3-b]pyridin-3-yl]-acetic acid and to intermediates that are used in such processes.
Zinc perchlorate catalyzed one-pot amination–annulation of α-cyanomethyl-β-ketoesters in water. Regioselective synthesis of 2-aminopyrrole-4-carboxylates
作者:Ayhan S. Demir、Mustafa Emrullahoglu
DOI:10.1016/j.tet.2005.11.018
日期:2006.2
In this paper, we report the efficient and regioselective synthesis of 2-aminopyrrole-4-carboxylates as derivatives of conformationally restricted analogues of gamma-amino butyrates (GABA) via a zinc perchlorate catalyzed amination-annulation of alpha-cyanomethyl-beta-ketoesters under mild reaction conditions in water. (c) 2005 Elsevier Ltd. All rights reserved.
PROCESS FOR PREPARING 1-(4-METHANESULFONYL-2-TRIFLUOROMETHYL-BENZYL)-2-METHYL-1H-PYRROLO [2,3-B]PYRIDIN-3-YL-ACETIC ACID
申请人:Novartis AG
公开号:US20200031824A1
公开(公告)日:2020-01-30
This invention relates to novel processes for synthesizing [1-(4-Methanesulfonyl-2-trifluoromethyl-benzyl)-2-methyl-1H-pyrrolo[2,3-b]pyridin-3-yl]-acetic acid and to intermediates that are used in such processes.
An effective new synthesis of 2-aminopyrrole-4-carboxylates
作者:Ayhan S. Demir、Mustafa Emrullahoglu
DOI:10.1016/j.tet.2005.08.050
日期:2005.10
α-cyanomethyl-β-dicarbonyl compounds with amines catalyzed by p-TsOH affords the corresponding enamines in good yields. Base catalyzed cyclization via the addition of an amine moiety to the carbon–nitrogentriplebond of nitrile furnished 2-aminopyrroles in high yields.