Abstract

An easy and efficient synthetic methodology for the one-pot stereocontrolled synthesis of tetrahydroquinolines through Lewis acid activated Povarov reaction is described. The protocol takes advantage of the very cheap, easy to handle, and environmentally friendly cerium trichloride as catalyst and allows to obtain either the anti- or the syn-isomer of the final tetrahydroquinoline with good selectivity, by performing the reaction in solvent or solventless conditions. The scope of the reaction is expanded to the one-pot synthesis of N-alkyltetrahydroquinolines through a very efficient iminium-Povarov approach. A deeper insight on the reaction system was provided by the study on the side reactions occurring in the reaction conditions and on the nature of the stereoselectivity.

An easy and efficient synthetic methodology for the one-pot stereocontrolled synthesis of tetrahydroquinolines through Lewis acid activated Povarov reaction is described. The protocol takes advantage of the very cheap, easy to handle, and environmentally friendly cerium trichloride as catalyst and allows to obtain either the anti- or the syn-isomer of the final tetrahydroquinoline with good selectivity, by performing the reaction in solvent or solventless conditions. The scope of the reaction is expanded to the one-pot synthesis of N-alkyltetrahydroquinolines through a very efficient iminium-Povarov approach. A deeper insight on the reaction system was provided by the study on the side reactions occurring in the reaction conditions and on the nature of the stereoselectivity.

中文翻译：

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有效的路易斯酸催化的Povarov反应，用于一锅立体控制合成多官能化的四氢喹啉

摘要

描述了一种通过路易斯酸活化的Povarov反应一锅立体控制合成四氢喹啉的简便有效的合成方法。该方案利用了非常便宜，易于操作且环保的三氯化铈作为催化剂的优势，并允许在溶剂或无溶剂条件下进行反应，从而以良好的选择性获得最终四氢喹啉的反-或顺-异构体。 。反应范围扩大到一锅法合成N-烷基四氢喹啉通过非常有效的亚胺-Povarov方法。通过对在反应条件下发生的副反应和立体选择性的性质的研究，对反应体系有了更深入的了解。

描述了一种通过路易斯酸活化的Povarov反应一锅立体控制合成四氢喹啉的简便有效的合成方法。该方案利用了非常便宜，易于操作且环保的三氯化铈作为催化剂的优势，并允许在溶剂或无溶剂条件下进行反应，从而以良好的选择性获得最终四氢喹啉的反-或顺-异构体。 。反应范围扩大到一锅法合成N-烷基四氢喹啉通过非常有效的亚胺-Povarov方法。通过对在反应条件下发生的副反应和立体选择性的性质的研究，对反应体系有了更深入的了解。