CHIRAL Rh/SiO2 CATALYSTS FOR ENANTIOSELECTIVE HYDROGENATION REACTIONS: THE ROLE OF (S,S)-DIPAMP AS CHIRAL MODIFIER AND STABILIZER ON METALLIC NANOPARTICLES SYNTHESIS

Journal of The Chilean Chemical Society

MELLA, CLAUDIO¹  REYES, PATRICIO¹  SÁNCHEZ, ARIEL¹  ÁVILA, MAURICIO¹  RUIZ, DORIS¹  MARZIALETTI, TERESITA¹ 

[1] Universidad de Concepción, Concepción, Chile

关键词: (S;    S)-;    DIPAMP;    stabilized nanoparticles;    enantioselective hydrogenation;    rhodium;    chiral ligand.;   

DOI  :  10.4067/S0717-97072013000400050

学科分类：化学（综合）

来源: Sociedad Chilena de Quimica

【 摘 要 】

Rhodium nanoparticles were successfullystabilized by the (S,S)-1,2-ethanediylbis[(2-ethoxyphenyl)phenylphosphine]((S,S)-DIPAMP) deposited on SiO2 prepared by a facilereduction and impregnation method. The chiral catalysts obtained were efficientfor the enantioselective hydrogenation reactions of prochiral compounds. Thecatalysts synthesized from [Rh(µ-OMe)(COD)]2 inthe presence of different amounts of a ligand used as chiral stabilizer, showedgood metal dispersion. As shown by TEM, the metal particle size ranged between1 and 2 nm using stabilizer and 9.1 nm was achieved without chiral ligand. Othertechniques were used to characterize the chiral catalysts such as X-raydiffraction (XRD), electron diffraction, thermogravimetric analysis (TGA) andN2 adsorption-desorption isotherms.

【 授权许可】

Unknown