[3 + 3]-Cycloaddition of Donor–Acceptor Cyclopropanes with Nitrile Imines Generated in Situ: Access to Tetrahydropyridazines

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• 作者：Lennart K. B. Garve ; Martin Petzold ; Peter G. Jones ; Daniel B. Werz
• 刊名：Organic Letters
• 出版年：2016
• 出版时间：February 5, 2016
• 年：2016
• 卷：18
• 期：3
• 页码：564-567
• 全文大小：371K
• ISSN：1523-7052

文摘

Donor–acceptor cyclopropanes are reacted under the influence of a Lewis acid with hydrazonyl chlorides to afford tetrahydropyridazines. Formally, this transformation can be regarded as a [3 + 3]-cycloaddition of three-membered rings and nitrile imines generated in situ. This efficient method provides fast access to a variety of structurally diverse pyridazine derivatives. The structure of a typical product was confirmed by X-ray crystallography.