through CNbondcleavage. In the presence of 5 mol% palladium diacetate, 10 mol% 1,4‐bis(diphenylphosphino)butane (dppb), and 5 mol% p‐toluenesulfonic acid (TsOH), a range of α‐unbranched primary allylic amines smoothly underwent deammoniative condensation with nonallylic amines in an α‐selective fashion to give structurally diverse secondary and tertiary amines in good to excellent yields and E selectivity
C–N Bond Formation from Allylic Alcohols via Cooperative Nickel and Titanium Catalysis
作者:S. Hadi Nazari、Norma Tiempos-Flores、Kelton G. Forson、Jefferson E. Bourdeau、David J. Michaelis
DOI:10.1021/acs.joc.8b01474
日期:2018.9.7
Amination of allylicalcohols is facilitated via cooperative catalysis. Catalytic Ti(O-i-Pr)4 is shown to dramatically increase the rate of nickel-catalyzed allylic amination, and mechanistic experiments confirm activation of the allylicalcohol by titanium. Aminations of primary and secondary allylicalcohols are demonstrated with a variety of amine nucleophiles. Diene-containing substrates also cyclize
N-Heterocyclic Carbene C,S Palladium(II) π-Allyl Complexes: Synthesis, Characterization, and Catalytic Application In Allylic Amination Reactions
作者:Deepa Krishnan、Meiyi Wu、Minyi Chiang、Yongxin Li、Pak-Hing Leung、Sumod A. Pullarkat
DOI:10.1021/om400110t
日期:2013.4.22
carbene C,S palladium(II) π-allylcomplexes were successfully developed and characterized. Structural analyses of these complexes revealed that the organopalladium chelates adopt a skew-envelope conformation with a trans disposition of the substituents on the metal chelate rings. Utilizing these C,S palladium(II) π-allylcomplexes as catalysts, a catalytic system for the allylic amination reaction has
Copper-catalyzed hydroboration of propargyl-functionalized alkynes in water
作者:Jessie S. da Costa、Roger K. Braun、Pedro A. Horn、Diogo S. Lüdtke、Angélica V. Moro
DOI:10.1039/c6ra14465a
日期:——
The Cu-catalyzed hydroboration of alkynes in operationally simple and environmentally friendly conditions is reported. The reactions are performed in water, at room temperature, under micellar catalysis. Conditions to form the α or β borylated products selectively have been found and as an application a protocol for the tandem hydroboration/Suzuki coupling in water was developed.
A new direct catalytic amination of allylic alcohols promoted by the combination of platinum and a large bite-angle ligand DPEphos was developed in which the allylic alcohol was effectively converted to a pi-allylplatinum intermediate without the use of an activating reagent. The use of the DPEphos ligand was essential for obtaining high catalyst activity and high monoallylation selectivity of primary