A novel tert-amino effect based approach to 1,2,3,4-tetrahydroquinoline-2-spirocycloalkanes
摘要:
An interaction of 2-[cyclohexyl(methyl)amino]benzaldehydes with substituted acetonitriles X-CH2CN (X=CN, Tos, hetaryl) was found to yield 1-methyl-1,2,3,4-tetrahydrospiro(quinoline-2,1'-cyclohexane)-3-carbonitriles. The corresponding spiroquinoline-2,1'-cyclopentane analogues were obtained similarly starting from 2-[cyclopentyl(methyl)amino]benzaldehydes. The reaction was assumed to proceed via initial Knoevenagel condensation and further ring closure of the formed adduct according to the tert-amino effect mechanism. The structure of the prepared compounds was confirmed unambiguously by X-ray crystallographic study. (c) 2006 Elsevier Ltd. All rights reserved.
A novel tert-amino effect based approach to 1,2,3,4-tetrahydroquinoline-2-spirocycloalkanes
摘要:
An interaction of 2-[cyclohexyl(methyl)amino]benzaldehydes with substituted acetonitriles X-CH2CN (X=CN, Tos, hetaryl) was found to yield 1-methyl-1,2,3,4-tetrahydrospiro(quinoline-2,1'-cyclohexane)-3-carbonitriles. The corresponding spiroquinoline-2,1'-cyclopentane analogues were obtained similarly starting from 2-[cyclopentyl(methyl)amino]benzaldehydes. The reaction was assumed to proceed via initial Knoevenagel condensation and further ring closure of the formed adduct according to the tert-amino effect mechanism. The structure of the prepared compounds was confirmed unambiguously by X-ray crystallographic study. (c) 2006 Elsevier Ltd. All rights reserved.
Diastereoselective Spirocyclization via Intramolecular C(
<i>sp</i>
<sup>3</sup>
)−H Bond Functionalization Triggered by Sequential [1,5]‐Hydride Shift/Cyclization Process: Approach to Spiro‐tetrahydroquinolines
作者:Arup Bhowmik、Sumit Das、Writhabrata Sarkar、K. M. Saidalavi、Aniket Mishra、Anupama Roy、Indubhusan Deb
DOI:10.1002/adsc.202001011
日期:2021.2.2
functionalization triggered by sequential [1,5]‐ hydrideshift /cyclization sequence using ortho amino benzaldehydes and active methylene compounds such as 2‐coumaranone, 4‐hydroxycoumarin, 3‐coumaranone, and 3‐isochromanone. This protocol provides a Lewis acid catalyst‐free straight forward one‐pot reaction in cases of 2‐coumaranone and 4‐hydroxycoumarin, Lewis acid‐catalyzed stepwise reaction for 3‐coumaranone
Benzimidazoles, and their production formulation and use as gastric acid secretion inhibitors
申请人:FISONS plc
公开号:EP0174717B1
公开(公告)日:1992-01-22
A novel tert-amino effect based approach to 1,2,3,4-tetrahydroquinoline-2-spirocycloalkanes
作者:Anton V. Tverdokhlebov、Alexander P. Gorulya、Andrey A. Tolmachev、Alexander N. Kostyuk、Alexander N. Chernega、Eduard B. Rusanov
DOI:10.1016/j.tet.2006.07.042
日期:2006.9
An interaction of 2-[cyclohexyl(methyl)amino]benzaldehydes with substituted acetonitriles X-CH2CN (X=CN, Tos, hetaryl) was found to yield 1-methyl-1,2,3,4-tetrahydrospiro(quinoline-2,1'-cyclohexane)-3-carbonitriles. The corresponding spiroquinoline-2,1'-cyclopentane analogues were obtained similarly starting from 2-[cyclopentyl(methyl)amino]benzaldehydes. The reaction was assumed to proceed via initial Knoevenagel condensation and further ring closure of the formed adduct according to the tert-amino effect mechanism. The structure of the prepared compounds was confirmed unambiguously by X-ray crystallographic study. (c) 2006 Elsevier Ltd. All rights reserved.