Ag+ -assisted hydrosilylation: complementary behavior of Rh and Ir catalysts (reversal of enantioselectivity) |
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| Authors: | Frölander Anders Moberg Christina |
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| Affiliation: | KTH School of Chemical Science and Engineering, Organic Chemistry, SE 100 44 Stockholm, Sweden. |
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| Abstract: | [structure: see text]. The presence of a suitably situated hydroxy function in a PHOX ligand leads to an enhancement of the enantioselectivity in Rh-catalyzed hydrosilylations of prochiral ketones in the presence of AgBF4 (95% ee for acetophenone as compared to 75% using i-Pr-phosphinooxazoline (PHOX)). Exchanging Rh for Ir affords the product with the opposite absolute configuration (78% ee). |
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