N-Octanoyldimethylglycine Trifluoroethyl Ester, an Acyl Donor Leading to Highly Enantioselective Protease-Catalysed Kinetic Resolution of Amines
作者:Severine Queyroy、Nicolas Vanthuyne、Stéphane Gastaldi、Michèle P. Bertrand、Gérard Gil
DOI:10.1002/adsc.201100993
日期:2012.6.18
The use of N‐octanoyldimethylglycine trifluoroethylester as acyldonor in the kineticresolution of aliphatic amines catalysed by proteases led to enantiomeric ratios >200 in most cases. The resolutions mediated by Protex 6L were shown to be much faster than the resolutions achieved with the most efficient commercially available serine proteases, i.e., alkaline protease, Properase 1600L, and Subtilisin
Palladium-N-Heterocyclic Carbene (NHC)-Catalyzed Asymmetric Synthesis of Indolines through Regiodivergent C(sp<sup>3</sup>)H Activation: Scope and DFT Study
作者:Dmitry Katayev、Evgeny Larionov、Masafumi Nakanishi、Céline Besnard、E. Peter Kündig
DOI:10.1002/chem.201403985
日期:2014.11.10
Two bulky, chiral, monodentate N‐heterocyclic carbene ligands were applied to palladium‐catalyzed asymmetricCH arylation to incorporate C(sp3)H bond activation. Racemic mixtures of the carbamate starting materials underwent regiodivergent reactions to afford different trans‐2,3‐substituted indolines. Although this CArCalkyl coupling requires high temperatures (140–160 °C), chiral induction is high