Asymmetric Zinc-Catalyzed Hydrosilylation of Ketones and the Effect of Carboxylate on the Enantioselectivity

ABSTRACT Several chiral ligands containing (R,R)‐diaminocyclohexane moieties and pyrrole, furan, or benzene have been synthesized. These ligands were tested in enantioselective zinc‐catalyzed hydrosilylation reactions; excellent enantioselectivities were obtained when the ligands containing (R,R)‐di...

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Veröffentlicht in:	Chirality (New York, N.Y.) N.Y.), 2013-05, Vol.25 (5), p.275-280
Hauptverfasser:	Pang, Shaofeng, Peng, Jiajian, Li, Jiayun, Bai, Ying, Xiao, Wenjun, Lai, Guoqiao
Format:	Artikel
Sprache:	eng
Schlagworte:	asymmetric catalytic hydrosilylation Asymmetry Carboxylates Carboxylic Acids - chemistry Catalysis Chirality Furans Hydrosilylation influence of carboxylate Ketones Ketones - chemistry Ligands Magnetic Resonance Spectroscopy Mass Spectrometry N-Acetylneuraminic Acid - chemistry Stereoisomerism Zinc - chemistry zinc acetate zinc chloride Zinc chlorides
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Zusammenfassung:	ABSTRACT Several chiral ligands containing (R,R)‐diaminocyclohexane moieties and pyrrole, furan, or benzene have been synthesized. These ligands were tested in enantioselective zinc‐catalyzed hydrosilylation reactions; excellent enantioselectivities were obtained when the ligands containing (R,R)‐diaminocyclohexane moieties and furan rings were used. For comparison, zinc chloride combined with different potassium carboxylate salts and ligands were also tested for catalytic hydrosilylation reactions. Chirality 25:275–280, 2013. © 2013 Wiley Periodicals, Inc.
ISSN:	0899-0042 1520-636X
DOI:	10.1002/chir.22137