A simple metal-free, step-economic and selective access to pyridines from readily available substrates is reported, involving a flexible 4 A molecular sieves promoted Michael addition initiated domino three-component reaction between a 1,3-dicarbonyl, a Michael acceptor and a synthetic equivalent of ammonia.
Metal-Free Michael-Addition-Initiated Three-Component Reaction for the Regioselective Synthesis of Highly Functionalized Pyridines: Scope, Mechanistic Investigations and Applications
and completely regioselective three-componentsynthesis of highly functionalizedpyridines from 1,3-dicarbonyl derivatives and Michael acceptors has been achieved. Activated Michael acceptors, that is, β,γ-unsaturated α-oxo carbonyl derivatives, were utilized, allowing substitution at the 4-position and remarkable functional diversity at the 2-position of the pyridine ring. The scope and limitations
Pd0/PR3-Catalyzed Arylation of Nicotinic and Isonicotinic Acid Derivatives
作者:Masayuki Wasa、Brady T. Worrell、Jin-Quan Yu
DOI:10.1002/anie.200906104
日期:——
Intermolecular CH functionalization of pyridine rings at the 3‐ and 4‐positions is described using a Pd0/PR3/ArBr catalytic system. This reaction provides a powerful method for the preparation of structurally diverse nicotinic and isonicotinic acids that are of great importance in drug discovery.
有益于您的健康:使用 Pd 0 /PR 3 /ArBr 催化系统描述了 3 位和 4 位吡啶环的分子间 C H 官能化。该反应为制备结构多样的烟酸和异烟酸提供了一种强有力的方法,这些酸和异烟酸在药物发现中具有重要意义。
Verfahren zur Anilidierung von Carbonsäureestern
申请人:Wacker-Chemie GmbH
公开号:EP0003105A1
公开(公告)日:1979-07-25
Die Anilidierung von Carbonsiureestarn erfolgt erfindungsgemäß mit Magnesiumdi- bzw. Aluminiumtrianiliden. Der Vorteil des Verfahrens gegenüber herkömmlichen Anilidierungen von Carbonsäureestern besteht in der häufig leichteren Zugänglichkeit des Anilidierungsmittels, sowie in der höheren Ausbeute und größeren Reinheit der Reaktionsprodukte. Die erhaltenen Verbindungen dienen als Zwischenprodukte bzw. direkt als Pesticide.
Investigation of naphthyridines. 12. Synthesis of substituted 5-oxo-5,6,7,8-tetrahydro-1,6-naphthyridines by cyclization of 2-styrylnicotinic acid amides