A Multifunctional Reagent Designed for the Site-Selective Amination of Pyridines
摘要:
We report the development of a multifunctional reagent for the direct conversion of pyridines to Boc-protected 2-aminopyridines with exquisite site selectivity and chemoselectivity. The novel reagent was prepared on 200-g scale in a single step, reacts in the title reaction under mild conditions without precautions toward air or moisture, and is tolerant of nearly all common functionality. Experimental and in situ spectroscopic monitoring techniques provide detailed insights and unexpected findings for the unique reaction mechanism.
[EN] SULFONAMIDE DERIVATIVES, THEIR PRODUCTION AND USE<br/>[FR] DERIVES DE LA SULFONAMIDE, LEUR PRODUCTION ET LEURS UTILISATIONS
申请人:TAKEDA CHEMICAL INDUSTRIES, LTD.
公开号:WO1998054164A1
公开(公告)日:1998-12-03
(EN) The present invention provides compounds which specifically inhibit FXa, which are effective when orally administered and which are useful as a safe medicine for the prevention or treatment of diseases caused by thrombus or infarction. Compounds of this invention are piperazinones of formula (I), wherein R1 is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group; the ring A is an optionally substituted divalent nitrogen-containing heterocyclic group, in addition to the group of formula (II) and the group of formula (III); Y is an optionally substituted divalent hydrocarbon group or an optionally substituted divalent heterocyclic group; X is a direct bond or an optionally substituted alkylene chain; Z is: (1) an amino group substituted with an optionally substituted hydrocarbon group, (2) an optionally substituted imino group or (3) an optionally substituted nitrogen-containing heterocyclic group; provided that when X is a direct bond and Z is an optionally substituted 6-membered nitrogen-containing aromatic heterocyclic group, Y is an optionally substituted divalent hydrocarbon group or an optionally substituted divalent unsaturated heterocyclic group; or a salt thereof.(FR) L'invention porte sur des composés inhibiteurs spécifiques du FXa, efficaces par voie orale et constituant une médication sûre pour le traitement des thromboses ou des infarctus. Ces composés sont des pipérazinones de formule (I) dans laquelle: R1 est un groupe hydrocarboné facultativement substitué ou un groupe hétérocyclique facultativement substitué; l'anneau A est un groupe hétérocyclique divalent facultativement substitué contenant de l'azote en plus des groupes de formule (II) et (III); Y est un groupe hydrocarboné divalent facultativement substitué; X est une liaison directe ou une chaîne alkylène facultativement substitué; Z est (1) un groupe amino substitué par un groupe hydrocarboné facultativement substitué, (2) un groupe imino facultativement substitué, (3) un groupe hétérocyclique facultativement substitué contenant de l'azote; sous réserve que quand X est une liaison directe, Z soit un groupe hétérocyclique aromatique à 6 éléments facultativement substitué contenant de l'azote, et que Y soit un groupe hydrocarboné divalent facultativement substitué ou un groupe hétérocyclique hydrocarboné divalent insaturé facultativement substitué. L'invention porte également sur un de leurs sels.
Sulfonamide derivatives, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US06359134B1
公开(公告)日:2002-03-19
The present invention provides compounds which specifically inhibit FXa, which are effective when orally administered and which are useful as a safe medicine for the prevention or treatment of diseases caused by thrombus or infarction.
Compounds of this invention are piperazinones of the formula:
wherein R1 is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group; the ring A is an optionally substituted divalent nitrogen-containing heterocyclic group, in addition to being substituted by the group of the formula:
and the group of the formula:
Y is an optionally substituted divalent hydrocarbon group or an optionally substituted divalent heterocyclic group; X is a direct bond or an optionally substituted alkylene chain; Z is (1) an amino group substituted with an optionally substituted hydrocarbon group, (2) an optionally substituted imino group or (3) an optionally substituted nitrogen-containing heterocyclic group; provided that when X is a direct bond and Z is an optionally substituted 6-membered nitrogen-containing aromatic heterocyclic group, Y is an optionally substituted divalent hydrocarbon group or an optionally substituted divalent unsaturated heterocyclic group; or a salt thereof.
A Multifunctional Reagent Designed for the Site-Selective Amination of Pyridines
作者:Patrick S. Fier、Suhong Kim、Ryan D. Cohen
DOI:10.1021/jacs.0c03537
日期:2020.5.13
We report the development of a multifunctional reagent for the direct conversion of pyridines to Boc-protected 2-aminopyridines with exquisite site selectivity and chemoselectivity. The novel reagent was prepared on 200-g scale in a single step, reacts in the title reaction under mild conditions without precautions toward air or moisture, and is tolerant of nearly all common functionality. Experimental and in situ spectroscopic monitoring techniques provide detailed insights and unexpected findings for the unique reaction mechanism.