Journal
TETRAHEDRON LETTERS
Volume 49, Issue 15, Pages 2355-2358Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.02.075
Keywords
quinoline; 4-methylpyridine; N-methylimidazole; acetylenic esters; spiro compound; 1,3-indanedione
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The 1:1 intermediate generated by the addition of quinoline to dialkyl acetylenedicarboxylates is trapped by 1,3-indanedione to yield dialkyl 3-spiroindanedione-1,2,3,3a-tetrahydropyrrolo[1,2-a]quinoline-1,2-dicarboxylates in good yields. The structures of these products were confirmed by NMR and single-crystal X-ray diffraction studies. (C) 2008 Elsevier Ltd. All rights reserved.
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