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The Anion of the Pentacarbonyl[(trans-2,6-dimethylmorpholino)(methyl)carbene]chromium Complex in the Reactions with Nitroalkenes

✍ Scribed by Emanuela Licandro; Stefano Maiorana; Laura Capella; Raffaella Manzotti; Antonio Papagni; Mary Pryce; Claudia Graiff; Antonio Tiripicchio

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 297 KB
Volume: 1998
Category: Article
ISSN: 1434-193X
DOI: 10.1002/(sici)1099-0690(199810)1998:10<2127::aid-ejoc2127>3.0.co;2-u

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✦ Synopsis

The diastereoselective Michael addition of the title anion to are formed as a result of an unexpected intramolecular transfer of an oxygen atom from the nitro group to the α-hydrogenand α-methyl-substituted conjugated nitroalkenes leads to new γ-nitrocarbene complexes and γ-hydrocarbene atom, with elimination of the pentacarbonylchromium(0) group, which is recovered in high yield as the ximoamides, respectively. The γ-nitrocarbene complexes can be quantitatively oxidized to γ-nitrobutyric acid derivatives PyCr(CO) 5 complex. (precursors of GABA derivatives); the γ-hydroximoamides

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