Formal Aniline Synthesis from Phenols through Deoxygenative N‐Centered Radical Substitution
作者:Samuel W. Lardy、Kristine C. Luong、Valerie A. Schmidt
DOI:10.1002/chem.201904288
日期:2019.12.2
lignin-derived substrates have emerged as desirable biorenewable chemical feedstocks for coupling reactions. A radical-mediated conversion of phenol derivatives to anilines is reported, using unfunctionalized hydroxamic acids as the N-centered radical source. The applicability of this triethylphosphitemediated O-atom transfer approach, which tolerates a range of steric and electronic demands to naturally
Electrochemical Reductive Smiles Rearrangement for C–N Bond Formation
作者:Xihao Chang、Qinglin Zhang、Chang Guo
DOI:10.1021/acs.orglett.8b03178
日期:2019.1.4
A conceptually new and synthetically valuable radical Smiles rearrangement reaction is reported under undivided electrolytic conditions. This protocol employs an entirely new strategy for the electrochemical radical Smiles rearrangement. Remarkably, an amidyl radical generated from the cleavage of the N–O bond under reductive electrolytic conditions plays a crucial role in this transformation. Various
Palladium-Catalyzed Intramolecular C–H Arylation of Arenes Using Tosylates and Mesylates as Electrophiles
作者:Christine S. Nervig、Peter J. Waller、Dipannita Kalyani
DOI:10.1021/ol302166n
日期:2012.9.21
paper describes a method for the palladium catalyzed intramolecular C–H arylation using tosylates and mesylates as electrophiles. The transformation is efficient for the synthesis of various heterocyclic motifs including furans, carbazoles, indoles, and lactams. Additionally, a protocol for the one-pot sequential tosylation/arylation of phenol derivatives is presented.
Preparation of pharmaceutical composition comprising, treatment of human and animal diseases with, and compounds of, 3,7-disubstituted-3-cephem-4-carboxylic acid.
Synthesis of Tertiary Amides from Anionically Activated Aromatic Trifluoromethyl Groups
作者:Gavin O’Mahony、Andrew K. Pitts
DOI:10.1021/ol100507n
日期:2010.5.7
In this paper, a novel synthesis of tertiary amides from anionically activated aromatic trifluoromethyl groups is presented. Anionically activated trifluoromethyl groups react with secondary amines under aqueous conditions to afford tertiary amides. The mechanism involves initial elimination of hydrogen fluoride by an E1cB mechanism to afford an electrophilic quinone methide- or azafulvene-type intermediate