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Synthesis of indolizine derivatives by the reaction of 2-(2′-pyridyl)-pyridinium ylides with ethylenic dipolarophiles

✍ Scribed by Ioan I. Druta; Mioara A. Andrei; Cristian I. Ganj; Pompiliu S. Aburel

Publisher: Elsevier Science
Year: 1999
Tongue: French
Weight: 424 KB
Volume: 55
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(99)00798-x

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✦ Synopsis

The reaction of 2-(2'-pyridyl)-pyridinium N-ylides with substituted ethylenes such as acrylonitrile and ethyl acrylate gave the corresponding tetrahydroindolizine derivatives in high yields. Tetrahydroindolizine derivatives were dehydrogenated by treating with tetrapyridinecobalt(II) bichromate [CoPy4(HCrO4)2] to give aromatic indofizines bearing cyano, aroy], 2'-pyridyi, ester group at the different positions. Seventeen new indolizine derivatives were prepared.

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