Reactivity of Stable Trifluoroacetaldehyde Hemiaminals. 2. Generation and Synthetic Potentialities of Fluorinated Iminiums
摘要:
Under Lewis acid activation, hemiaminals of trifluoroacetaldehyde and related (fluoroalkyl)-aldehydes generate iminium species that can react with various nucleophiles to provide fluorinated amines.
Visible‐Light‐Induced Cycloaddition of α‐Ketoacylsilanes with Imines: Facile Access to β‐Lactams
作者:Jian‐Heng Ye、Peter Bellotti、Tiffany O. Paulisch、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.202102451
日期:2021.6.7
report the synthesis of β-lactams from α-ketoacylsilanes and imines, which proceeds via a formal [2+2] photochemical cycloaddition with in situ generation of siloxyketene. This mild and operationally simple reaction proceeds in an atom-economic fashion with broad substrate scope, including aldimines, ketimines, hydrazones, and fused nitrogen heterocycles, affording a variety of important β-lactams with satisfactory
Anodic methoxylation and acetoxylation of imines and imidates
作者:Daisuke Baba、Toshio Fuchigami
DOI:10.1016/s0040-4039(03)00548-3
日期:2003.4
Anodic oxidation of cyclic imidates, 2-aryl-2-oxazolines, in methanol provided the corresponding 4-methoxylated products. Anodic α-methoxylation and α-acetoxylation of open-chain imines derived from glycine esters and benzophenone were also achieved using a bromide ion mediator. On the other hand, anodic α-acetoxylation of CF3-containing imine and imidate was successful without use of the bromine mediator
oxime ester derivatives can be used as both a halogen atom transfer (XAT) agent and an imine source under photocatalytic conditions, allowing the radical amination of alkyl halides, resulting in the formation of a broad scope of imines. Hydrolysis of the latter gives direct access to the corresponding primary amines. Mechanistically, the reaction is believed to proceed through the formation of aryl
Photochemical Reduction of Quinolines with γ-Terpinene
作者:Souvik Adak、Sarah E. Braley、M. Kevin Brown
DOI:10.1021/acs.orglett.3c04096
日期:2024.1.12
of complex rings. Herein, we demonstrate a process for photochemical dearomative reduction of quinolines. The process involves capture of a quinoline excited state with γ-terpinene. Importantly, the reaction is chemoselective as other easily reduced functionalities such as halogens or alkenes do not undergo reduction. The mechanism of the reaction has also been investigated. Finally, the generality of