Metal-Free Functionalization of N,N-Dialkylanilines via Temporary Oxidation to N,N-Dialkylaniline N-Oxides and Group Transfer
摘要:
A simple set of protocols for the controlled elaboration of anilines is reported allowing access to a diverse array of aminophenols, aminoarylsulfonates, alkylated anilines, and aminoanilines in 29-95% yield in a single laboratory operation from easily isolable, bench-stable N,N-dialkylaniline N-oxides. The introduction of new C-O, C-C, and C-N bonds on the aromatic ring is made possible by a temporary increase in oxidation level and excision of a weak N-O bond.
A Mild Synthesis of Aryl Triflates Enabling the Late‐Stage Modification of Drug Analogs and Complex Peptides
作者:Stefan Schiesser、Joanna Ceklarz、Johanna Kollback、Lucie Borowiec、Julia Fagerlund、Shakiba Vahdat、Marika Lindhagen、Okky Dwichandra Putra
DOI:10.1002/chem.202301421
日期:2023.7.26
triflates using a newly discovered reagent in presence of a fluoride source. The reactions are generally complete within a few minutes at room temperature. The mild conditions allow the late-stage O-triflation of complex peptides bearing challenging side chains like arginine and histidine. We show that aryl triflates can be an interesting moiety for medicinal chemistry.
Intermolecular Mizoroki-Heck Reaction of Aliphatic Olefins with High Selectivity for Substitution at the Internal Position
作者:Liena Qin、Xinfeng Ren、Yunpeng Lu、Yongxin Li、Jianrong Steve Zhou
DOI:10.1002/anie.201201806
日期:2012.6.11
New ligand for old reaction: The title reaction of aryltriflates with aliphatic olefins leads to substitution at the internal position with high selectivity. The ratio of the desired isomer (shown in the scheme) to the sum of all other isomers is generally above 10:1. The key to success is the use of a ferrocene bisphosphine ligand (R= 1‐naphthyl). The reaction can be easily scaled up, and minor isomers
Metal-Free Functionalization of <i>N</i>,<i>N</i>-Dialkylanilines via Temporary Oxidation to <i>N</i>,<i>N</i>-Dialkylaniline <i>N</i>-Oxides and Group Transfer
作者:Robert S. Lewis、Michael F. Wisthoff、J. Grissmerson、William J. Chain
DOI:10.1021/ol501813s
日期:2014.7.18
A simple set of protocols for the controlled elaboration of anilines is reported allowing access to a diverse array of aminophenols, aminoarylsulfonates, alkylated anilines, and aminoanilines in 29-95% yield in a single laboratory operation from easily isolable, bench-stable N,N-dialkylaniline N-oxides. The introduction of new C-O, C-C, and C-N bonds on the aromatic ring is made possible by a temporary increase in oxidation level and excision of a weak N-O bond.