Visible-light-mediated, nitrogen-centered radical amination of tertiary alkyl halides under metal-free conditions to form α-tertiary amines
作者:Alexander C. Brueckner、Erin N. Hancock、Evan J. Anders、Matthew M. Tierney、Heather R. Morgan、Kristina A. Scott、Angus A. Lamar
DOI:10.1039/c6ob00616g
日期:——
A mild and operationally convenient amino-functionalization of a range of tertiary alkyl halides by reaction with iminoiodinanes (PhINNs) and I2 has been developed. According to the mechanistic experiments described within, the reaction is speculated to proceed through a light-promoted, N-centered radical pathway involving a N,N-diiodosulfonamide reactive species. This method of direct N-incorporation
Experimental and Theoretical Investigations of the Bromination of Phenols with β and γ Aliphatic Substituents, including Rings
作者:Jinsong Zhang、Xiao Chang、Erich C. Bowman、Carter J. Holt、Michael W. Lodewyk、Randy M. Miller、Guangming Xia
DOI:10.1021/acs.joc.5b01866
日期:2015.9.18
Bromination reactions of substituted and ring fused phenols were studied by both experiment (t-BuNH-Br) and computation (density functional theory). The outcomes support each other, indicating a clear and predictable regioselective preference among 3,4-bis-alkylated and 3,4-ring-fused phenols.
A novel class of bridged indicator dyes is disclosed which possess absorption in the infrared region of the electromagnetic spectrum. These bridged indicator dyes are useful as light-absorbing, pH-sensitive optical filter agents in diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes. These indicator dyes will also find utility in titrations and other analytical techniques and products where pH-sensitive indicator dyes are employed and absorption of infrared is useful.
alkylaminyl radical formation and maintain the nucleophilicity of fluoride ion. This protocol exhibits excellent functional-group tolerance toward various aryl and unactivated alkenes, furnishing the corresponding β-fluoroamines with high regioselectivity. Mechanistic investigation reveals an aziridinium intermediate via a radical pathway. The syntheticutility of this transformation was demonstrated by