Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 125, Issue 29, Pages 8779-8789Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja021391f
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When complexed by selected ligands in either the BIPHEP or the SEGPHOS series, CuH is an extremely reactive catalyst capable of effecting asymmetric hydrosilylations of aromatic ketones at temperatures between -50 and -78degreesC. Inexpensive silanes serve as stoichiometric sources of hydride. Substrate-to-ligand ratios exceeding 100,000: 1 have been documented. The level of induction is usually in the > 90% ee category. The nature of the reagent has been investigated using spectroscopic and chemical means, although its composition remains unclear.
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