REACTIVITY OF A 2 HETEROATOM STABILIZED ANIONIC CHROMIUM-(0) CARBENE COMPLEX TOWARDS A MONOSUBSTITUTED AND A DISUBSTITUTED ALKYNE - NEW SYNTHESIS OF GAMMA-AMINOBUTENOLIDES AND FORMATION OF A NOVEL OLIGOMER CHROMIUM-(0) COMPLEX
C. Alvareztoledano et al., REACTIVITY OF A 2 HETEROATOM STABILIZED ANIONIC CHROMIUM-(0) CARBENE COMPLEX TOWARDS A MONOSUBSTITUTED AND A DISUBSTITUTED ALKYNE - NEW SYNTHESIS OF GAMMA-AMINOBUTENOLIDES AND FORMATION OF A NOVEL OLIGOMER CHROMIUM-(0) COMPLEX, Journal of organometallic chemistry, 540(1-2), 1997, pp. 41-49
The reaction of the chromium anionic carbene complex 1 towards dipheny
lacetylene and phenylacetylene is reported. In the former case the syn
thesis of gamma-functionalized butenolides results after demetallation
of the chromium complex 2 and the latter leads to the formation of a
novel oligomer chromium complex 5. These complexes were characterized
by mass spectrometry, IR and H-1 and C-13 NMR spectroscopies and their
structures were confirmed by single-crystal X-ray analysis. (C) 1997
Elsevier Science S.A.