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- W4288422058 abstract "Manganese complexes modified by simple alkane-diyl based P,N (Ph2PCH(CH3)(CH2)mCH(CH3)NHC2H5; m = 0, 1) and potentially tridentate P,N,N (Ph2PCH(CH3)(CH2)mCH(CH3)NH(CH2)nN(CH3)2; m = 0, 1; n = 2, 3) type ligands have been synthesized and tested in the asymmetric hydrogenation of ketones. The combined coordination and catalytic studies led to the conclusion that the N-N tether length of the P,N,N type compounds plays a crucial role in determining the chemoselectivity, while the length of the P-N skeleton has been shown to affect the catalytic activity. Mn-catalysts containing P,N,N ligands with the proper tether lengths (m = 0, n = 1) provided high enantioselectivities (up to 95% ee) and activities in the asymmetric hydrogenation of acetophenone derivatives. The influence of substitution of the acetophenone substrate and the reaction conditions is demonstrated. Based on quantum chemistry calculations, a qualitative model explaining the origin of enantioselectivity is proposed." @default.
- W4288422058 created "2022-07-29" @default.
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- W4288422058 date "2022-08-01" @default.
- W4288422058 modified "2023-09-30" @default.
- W4288422058 title "Testing the role of the backbone length using bidentate and tridentate ligands in manganese-catalyzed asymmetric hydrogenation" @default.
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- W4288422058 doi "https://doi.org/10.1016/j.mcat.2022.112531" @default.
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