n of alkenes with anilines has been developed for the atom-economical synthesis of 2-substituted propanamides bearing an α-stereocenter. A novel phosphoramidite ligand L16 was discovered which exhibited very high reactivity and selectivity in the reaction. This asymmetric Markovnikov hydroaminocarbonylation employs readily available starting materials and tolerates a wide range of functional groups
A Novel Synthesis of 2,2-Disubstituted 3-Amino-2H-azirines Based on the Reaction between Amide Enolates and Diphenyl Phosphorochloridate
作者:Jos� M. Villalgordo、Heinz Heimgartner
DOI:10.1002/hlca.19930760809
日期:1993.12.15
A novel synthesis of 2,2-disubstituted 3-amino-2H-azirines based on the reaction between amide enolates and diphenyl phosphorochloridate (DPPCl), followed by treatment with NaN3 is presented. The yields obtained in general are excellent, and the method is suitable for laboratory-scale preparations as well as for larger amounts.
Development of an N-heterocyclic carbene ligand based on concept of chiral mimetic
作者:Takafumi Arao、Kazuhiro Kondo、Toyohiko Aoyama
DOI:10.1016/j.tetlet.2005.12.098
日期:2006.2
Development of a new N-heterocyclic carbene ligand based on the concept of a chiral mimetic is described. In Pd-catalyzed enantioselective intramolecular α-arylation of N-(2-bromophenyl)-N-methyl-2-arylpropanamide, (4R,5R)-4,5-diphenyl-1,3-diadamantylmethyl-4,5-dihydro-3H-imidazol-1-ium tetrafluoroborate is shown to function as a good N-heterocyclic carbene precursor.
Rhodium-Catalyzed Enantioselective Reductive Arylation: Convenient Access to 3,3-Disubstituted Oxindoles
作者:Young Jin Jang、Egor M. Larin、Mark Lautens
DOI:10.1002/anie.201704922
日期:2017.9.18
All systems Ar go: A novel approach for the synthesis of 3,3-disubstituted oxindoles was developed using a rhodium-Josiphos chiral catalyst system. This unusual enantioselective rhodium-catalyzed reductive arylation, which functions across a range of substrates, serves as an alternative to palladium(0)-catalyzed α-arylation and does not require the use of a strong base for enolate formation.
Acid-free regioselective aminocarbonylation of alkenes
作者:Huizhen Liu、Ning Yan、Paul J. Dyson
DOI:10.1039/c4cc02167c
日期:——
An efficient method for the synthesis of N-aryl monosubstituted carboxamides via the Pd-catalyzed carbonylation of alkenes with CO and amines is described.