A CONVERGENT APPROACH TO THE TOTAL SYNTHESIS OF TELMISARTAN VIA A SUZUKI CROSS-COUPLING REACTION
申请人:VIRGINIA COMMONWEALTH UNIVERSITY
公开号:US20170260146A1
公开(公告)日:2017-09-14
Methods of synthesizing the angiotensin II receptor antagonist telmisartan in high yield and purity are provided. The methods involve the coupling of two structurally distinct benzimidazole units via a Suzuki cross-coupling reaction. Methods of regioselectively synthesizing one of the benzimidazole units are also provided.
Improved and ligand-free copper-catalyzed cyclization for an efficient synthesis of benzimidazoles from <i>o</i>-bromoarylamine and nitriles
作者:Emmanuel Mintah Bonku、Hongjian Qin、Abdullajon Odilov、Safomuddin Abduahadi、Samuel Desta Guma、Feipu Yang、Fuqiang Zhu、Haji A. Aisa、Jingshan Shen
DOI:10.1039/d4ra00245h
日期:——
improved copper-catalyzed cyclization for an efficient synthesis of benzimidazoles from o-bromoarylamine and nitriles, under mild and ligand-free conditions. The optimal conditions yielded exceptional products of up to 98%, demonstrating the broad applicability of this synthetic strategy in generating a wide range of valuable imidazole derivatives. This methodology enables the efficient synthesis of various
[DE] NEUE VERBINDUNGEN<br/>[EN] NOVEL COMPOUNDS<br/>[FR] NOUVEAUX COMPOSÉS
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2009034029A2
公开(公告)日:2009-03-19
Gegenstand der vorliegenden Erfindung sind neue CGRP-Antagonisten der allgemeinen Formel (I), in der A, X, R1, R2 und R3 wie in der Beschreibung erwähnt definiert sind, deren Tautomere, deren Isomere, deren Diastereomere, deren Enantiomere, deren Hydrate, deren Gemische und deren Salze sowie die Hydrate der Salze, insbesondere deren physiologisch verträgliche Salze mit anorganischen oder organischen Säuren oder Basen, diese Verbindungen enthaltende Arzneimittel, deren Verwendung und Verfahren zu ihrer Herstellung.