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1-Metalla-1,3,5,7-octatetraenes by 4-addition of (1,3-dien-2-yl)amines to (1-alkynyl)carbene complexes (M = Cr, W)

✍ Scribed by Rudolf Aumann; Inigo J. Göttker-Schnetmann; Birgit Wibbeling; Roland Fröhlich

Book ID: 104258618
Publisher: Elsevier Science
Year: 1998
Tongue: French
Weight: 201 KB
Volume: 39
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(97)10740-7

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✦ Synopsis

Addition of (1-phenyl)ethenyl-amines H2C=C(NR2)Ph 2a,b to (1-alkynyl)carbene complexes (CO)5M=C(OEt)C--CPh la,b (M--W, Cr) affords 1-metalla-l,3,5-hexatrienes 4a-c in 90 -95%. Addition of N-[1-(cyclohex-l-enyl)]ethenyl-amines H2C=C(NR2)-(-)C= CH(CH2)4~ 2c,d to compounds la,b yields novel 1-metalla-l,3,5,7 -octatetraenes (CO)sM=C(OEt)-CH=C(Ph)-CH=C(NR2)-(-)C=CH (CH2)4-4d-f as major products together with a [4+2] cycloadduct 5d as minor product. Compounds 4 and 5 have been fully characterized spectroscopically, compound 4d also by X-ray analysis.

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