The synthesis of a series of ruthenium-based metathesis catalysts featuring imine donors chelated through the alkylidene group is described. The relative placement of the imine carbon-nitrogen double bond (exocyclic vs endocyclic) has a major impact on the initiation behavior. When used in metathesis applications, catalysts with an endocyclic imine bond show latent behavior and a high degree of tunability. The incorporation of additional donor atoms is an additional strategy for controlling initiation behavior. These latent catalysts could be useful in high-temperature applications.
Palladium(0)-catalyzed rearrangement of N-allyl enamines. Synthesis of .delta.,.epsilon.-unsaturated imines and .gamma.,.delta.-unsaturated carbonyl compounds
Palladium(0) catalyzed 3-aza-cope rearrangement of N-allylenamines
作者:Shun-ichi Murahashi、Yoshiki Makabe
DOI:10.1016/s0040-4039(01)80888-1
日期:1985.1
Pd(0) complexes catalyze the 3-Aza-Cope rearrangement of N-allylenamines to the corresponding δ,ε-unsaturated imines or γ,δ-unsaturated carbonyl compounds in the presence of trifluoro-acetic acid as co-catalyst.
Palladium(0)-catalyzed rearrangement of N-allyl enamines. Synthesis of .delta.,.epsilon.-unsaturated imines and .gamma.,.delta.-unsaturated carbonyl compounds
The synthesis of a series of ruthenium-based metathesis catalysts featuring imine donors chelated through the alkylidene group is described. The relative placement of the imine carbon-nitrogen double bond (exocyclic vs endocyclic) has a major impact on the initiation behavior. When used in metathesis applications, catalysts with an endocyclic imine bond show latent behavior and a high degree of tunability. The incorporation of additional donor atoms is an additional strategy for controlling initiation behavior. These latent catalysts could be useful in high-temperature applications.