Non-Precious Metals Catalyze Formal [4 + 2] Cycloaddition Reactions of 1,2-Diazines and Siloxyalkynes under Ambient Conditions
作者:Chintan S. Sumaria、Yunus E. Türkmen、Viresh H. Rawal
DOI:10.1021/ol501254h
日期:2014.6.20
Copper(I) and nickel(0) complexes catalyze the formal [4 + 2] cycloaddition reactions of 1,2-diazines and siloxyalkynes, a reaction hitherto best catalyzed by silver salts. These catalysts based on earth abundant metals are not only competent, but the copper catalyst, in particular, promotes cycloadditions of pyrido[2,3-d]pyridazine and pyrido[3,4-d]pyridazine, enabling a new synthesis of quinoline
铜 (I) 和镍 (0) 配合物催化 1,2-二嗪和甲硅烷氧基炔烃的正式 [4 + 2] 环加成反应,该反应迄今为止最好由银盐催化。这些基于富含地球的金属的催化剂不仅有能力,而且铜催化剂,特别是促进吡啶并[2,3- d ]哒嗪和吡啶并[3,4- d ]哒嗪的环加成,使喹啉和异喹啉衍生物,以及环己烯酮与甲硅烷氧基炔烃的正式 [2 + 2] 环加成反应。