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.
Syntheses of heterocyclic compounds. Part XXIV. Cyclisation studies with ortho-substituted arylcarbene and arylnitrene precursors
作者:G. V. Garner、D. B. Mobbs、H. Suschitzky、J. S. Millership
DOI:10.1039/j39710003693
日期:——
indolines. The scope and mechanism of this cyclisation have been explored. Moreover, benzaldehyde tosylhydrazones with o-alkoxy-, o-thioalkyl-, and o-phosphonate substituents as well as the corresponding diazoalkanes were pyrolysed and photolysed. The products from these carbene precursors were compared with those obtained from the analogous nitrene precursors [i.e. ArN3 or ArNO2+(RO)3P].
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.