Photochemically catalyzed Diels–Alder reaction of arylimines with N-vinylpyrrolidinone and N-vinylcarbazole by 2,4,6-triphenylpyrylium salt: synthesis of 4-heterocycle-substituted tetrahydroquinoline derivatives
摘要:
Photochemically promoted Diels-Alder reactions of N-arylimines with N-vinylpyrrolidinone and N-vinylcarbazole were achieved by using 2,4,6-triphenylpyrylium tetrafluoroborate as a catalyst to produce corresponding 2-oxopyrrolidin-1-yl and carbazol-9-yltetrahydroquinolines in high yields. (C) 2004 Elsevier Ltd. All rights reserved.
Tetrahydroquinoline syntheses induced with catalytic amounts of viologen additives
作者:Zheng Xue、Anindya Samanta、Bruce R. Whittlesey、Michael F. Mayer
DOI:10.1016/j.tetlet.2009.08.058
日期:2009.11
The viologen N,N'-dicyanomethyl-4,4'-bipyridinium center dot 2PF(6) was found to induce an aza-Diels-Alder reaction of N-arylimines with N-vinylpyrrolidinone or N-vinylcarbazole, producing tetrahydroquinoline derivatives with high cis/trans selectivities and yields. (C) 2009 Elsevier Ltd. All rights reserved.