In this study, a series of gamma,gamma-disubstituted and beta,gamma-disubstituted allylic alcohols were prepared and successfully hydrogenated using suitable N,P-based Ir complexes. High yields and excellent enantioselectivities were obtained for most of the substrates studied. This investigation also revealed the effect of the acidity of the N,P-Ir-complexes on the acid sensitive allylic alcohols. DFT Delta pK(a) calculations were used to explain the effect of the N,P-ligand on the acidity of the corresponding Ir-complex. The selectivity model of the reaction was used to accurately predict the absolute configuration of the hydrogenated alcohols.
机构:
Department of Biochemistry and Organic Chemistry, Uppsala University, Box 576, 751 24 Uppsala, SwedenDepartment of Biochemistry and Organic Chemistry, Uppsala University, Box 576, 751 24 Uppsala, Sweden
Cheruku, Pradeep
Diesen, Jarle
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机构:
Department of Biochemistry and Organic Chemistry, Uppsala University, Box 576, 751 24 Uppsala, SwedenDepartment of Biochemistry and Organic Chemistry, Uppsala University, Box 576, 751 24 Uppsala, Sweden
Diesen, Jarle
Andersson, Pher G.
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机构:
Department of Biochemistry and Organic Chemistry, Uppsala University, Box 576, 751 24 Uppsala, SwedenDepartment of Biochemistry and Organic Chemistry, Uppsala University, Box 576, 751 24 Uppsala, Sweden
Andersson, Pher G.
Journal of the American Chemical Society,
2008,
130
(16):
: 5595
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5599