Nazari SH, Tiempos-Flores N, Forson KG, Bourdeau JE, Michaelis DJ. C-N Bond Formation from Allylic Alcohols via Cooperative Nickel and Titanium Catalysis.
J Org Chem 2018;
83:10646-10654. [PMID:
30086629 DOI:
10.1021/acs.joc.8b01474]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Amination of allylic alcohols 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 allylic alcohol by titanium. Aminations of primary and secondary allylic alcohols are demonstrated with a variety of amine nucleophiles. Diene-containing substrates also cyclize onto the nickel allyl intermediate prior to amination, generating carbocyclic amine products. This tandem process is only achieved under our cooperative catalytic system.
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