期刊
TETRAHEDRON LETTERS
卷 45, 期 20, 页码 3889-3893出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2004.03.111
关键词
l-azafulvenium methides; N- and C-vinylpyrroles; 1,3-di-methyl-5-oxo-5H-pyrrolizine-2-carboxylate; l-aza-benzo[f]azulene-3-carboxylate
Extrusion of sulfur dioxide from pyrrolo[1,2-c]thiazole-2,2-dioxides led to the synthesis of functionalised pyrroles via the generation of 1-azafulvenium methides. Sealed tube reaction conditions allowed the synthesis of N- and C-vinylpyrroles whereas from FVP methyl 1,3-dimethyl-5-oxo-5H-pyrrolizine-2-carboxylate and 4-oxo-1,4-dihydro-1-aza-benzo[f]azulene-3-carboxylates were obtained. These last compounds could also be obtained from the FVP of the N- and C-vinylpyrroles. (C) 2004 Elsevier Ltd. All rights reserved.
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