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859426 
Journal Article 
Arene complexes of transition metals in reactions with nucleophilic reagents: XXX. Reaction of -halomesitylene [Tetramethyl(ethyl)cyclopentadienyl]rhodium(II) complexes with anions derived from CH acids 
Goryunov, LI; Romanova, NM; Zhilovskii, GS; Shteingarts, VD 
2007 
1 
Russian Journal of Organic Chemistry
ISSN: 1070-4280
EISSN: 1608-3393 
43 
1765 
Reactions of fluoro-and chloromesitylene -complexes [(6-1-Hlg-2,4,6-Me3C6H2)(5-C5EtMe4)Rh]-(BF4)2 (Hlg = F, Cl) with diethyl malonate anion in THF or acetone- d6 at 20C initially (within the first 530 min) involve nucleophile addition at unsubstituted carbon atom in the arene ligand with formation of -cyclohexadienyl complexes {[5-1-(EtOCO)2CH-1-H-3-Hlg-2,4,6-Me3C6H2](5-C5EtMe4)Rh}(BF4). The subsequent replacement of the halogen atom yields {[6-1-(EtOCO)2CH-2,4,6-Me3C6H2](5-C5EtMe4)Rh}(BF4)2, where the arene ligand is readily withdrawn from -coordination by the action of chloride ion or the solvent. Dimethyl mesitylmalonate was isolated in 76% yield. Likewise, the reactions with anions derived from malononitrile and ethyl cyanoacetate gave 2538% of the corresponding derivatives 1-R-2,4,6-Me3C6H2 where R = (NC)2CH or EtOCO(NC)CH. [ABSTRACT FROM AUTHOR] Copyright of Russian Journal of Organic Chemistry is the property of Springer Science & Business Media B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) 
ORGANORHODIUM compounds; CHEMICAL tests & reagents -- Research; anions; mesitylene; AROMATIC compounds -- Research; TRANSITION metals; NUCLEOPHILIC reactions