Domino Aryne Annulation via a Nucleophilic–Ene Process
摘要:
1,2-Benzdiyne equivalents possess the unique property that they can react with two arynophiles through iteratively generated 1,2- and 2,3-aryne intermediates. Upon rational modification on the second leaving group of these aryne precursors, a domino aryne annulation approach was developed through a nucleophilic-ene reaction sequence. Various benzo-fused N-heterocyclic frameworks were achievable under transition metal-free conditions with a broad substrate scope.
the counterion (I−, BF), a reductive cleavage of the N(1)–C(8a) bond (photo-Emde degradation). The corresponding N,N-dimethyl-3-phenylpropylamines are formed in high yields and without contamination by Hofmann degradation products of the tetrahydroquinolinium salts. Me groups at C(2) as well as substituents at C(6) (CH3, Cl, CH3O) favour the photo-Emde degradation. The aromatic Cl-substituent is reductively
Investigation of Steric and Electronic Features of 3-Iminophosphine-Based Palladium Catalysts for Intermolecular Hydroamination
作者:Nicholas C. Zingales、Andrew R. Shaffer、Joseph A. R. Schmidt
DOI:10.1021/om301102w
日期:2013.1.28
A series of (3-iminophosphine)allylpalladium triflate complexes with systematic variation of both steric and electronic features was isolated and characterized. The ability of the complexes in this series to catalyze the regioselective hydroamination of 3-methyl-1,2-butadiene with aryl amines to form solely the kinetic product was probed by observing conversion to products via NMR spectroscopy. The previously unstudied 3-iminophosphine ligand composed of a di-tert-butyl phosphine, cyclobutene backbone, and tert-butyl imine provided the most active palladium hydroamination catalyst for this transformation known to date.
Regioselective Iron-Catalyzed Allylic Amination
作者:Bernd Plietker
DOI:10.1002/anie.200602261
日期:2006.9.11
PARTALI, V.;JOLIDON, S.;HANSEN, H. -J., HELV. CHIM. ACTA, 1985, 68, N 7, 1952-1960