Tricarbonyl(dihydroazepinyl)chromium complexes and methylenepyrrolidines from (2'-dimethylaminoethenyl)carbenechromium complexes

Heiko Schirmer, Thomas Labahn, Bernard Flynn, Yao Ting Wu, Armin De Meijere

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The (3-amino-1-ethoxyalkenylidene)pentacarbonylchromium complexes 1 and 8 react with bulkily substituted terminal alkynes 2 and 9 in tetrahydrofuran to give η5-tricarbonyl(dihydroazepinyl)chromium complexes 3 and 12a which can be isolated in low yields. When the reactions are carried out in pyridine, the formal [5+2] cycloaddition is favored, but the complexes of type 12 are immediately further transformed to 2- (isobutyrylmethylene)pyrrolidines 13 in good yields.

Original languageEnglish
Pages (from-to)2004-2006
Number of pages3
JournalSynlett
Issue number12
DOIs
Publication statusPublished - 1999 Jan 1

All Science Journal Classification (ASJC) codes

  • Organic Chemistry

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