Palladium-Catalyzed C(sp2)–H Olefination of Free Primary and Secondary 2-Phenylethylamines: Access to Tetrahydroisoquinolines
摘要:
A rapid construction of THIQs by a Pd(II)-catalyzed C(sp(2))-H olefination of free primary and secondary 2-phenylethylamines with high step- and atom-economy was reported. Notably, no substituent was required at the alpha-position to the amino group of the 2-phenylethylamines. The substrate scope was broad, and the reaction could also be applied to generate THIQs from the biologically active molecules such as the drug molecule baclofen and phenylalanine ester.
Asymmetric Transfer Hydrogenation of 1-Naphthyl Ketones by an ansa-Ru(II) Complex of a DPEN-SO2N(Me)-(CH2)2(η6-p-Tol) Combined Ligand
摘要:
The first second-generation designer Ru(II) catalyst 1b featuring an enantiopure N,C-(N-ethylene-N-methyl-sulfamoyI)-tethered (DPEN-k(2)N,N)/n(6)toluene hybrid ligand Is introduced. Using an SIC 1000 in HCO2H Et3N 5:2 transfer hydrogenation medium, secondary 1-naphthyl alcohols are obtained in up to >99.9% ee under mild conditions. Mechanistic factors are discussed.