Alkylation selective de substituants aromatiques actives par un greffon chrome carbonyle |
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| Authors: | Gérard Simonneaux Gérard Jaouen |
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| Affiliation: | Stéréochimie des Eléments de Transition, Laboratoire de Chimie des Organométalliques, ERA CNRS n° 477,Université de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France |
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| Abstract: | The complexes (C6H5X)Cr(CO)3, where X is COCH3, CH2,CO2CH3 and CH3 are readily alkylated by either sodium hydride in DMF or by potassium tert-butoxide in DMSO. The activating influence brought about by the electron-withdrawing effect of the Cr(CO)3 group can be modified by replacement of a carbonyl group by P(OPh)3 or CS which lead to mono or dialkylated products respectively. |
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