Xanthate-mediated intermolecular alkylation of pyrazines
作者:Qi Huang、Ling Qin、Samir Z. Zard
DOI:10.1016/j.tet.2018.08.040
日期:2018.10
An expedient approach for the intermolecular C-H functionalization of pyrazines and other heteroarenes by the radical chemistry of xanthates is reported. Incorporation of a multitude of functional alkyl groups onto these heteroarenes proceeds in good yield and good to excellent regioselectivity, leading to highly functionalized heteroaromatics.
Efficient and Versatile Catalytic Systems for the N-Methylation of Primary Amines with Methanol Catalyzed by N-Heterocyclic Carbene Complexes of Iridium
作者:Ken-ichi Fujita、Genki Toyooka、Akiko Tuji
DOI:10.1055/s-0037-1610252
日期:2018.12
an appropriate catalyst). These findings can be used to develop methods for synthesizing useful amine compounds having N-methyl or N,N-dimethyl moieties. Efficient and versatile catalytic systems were developed for the N-methylation of both aliphatic and aromatic primary amines using methanol as the methylating agent. Iridium complexes bearing an N-heterocyclic carbene (NHC) ligand exhibited high catalytic
The direct N-monomethylation of aromatic primary amines, including arylamines, arylsulfonamides and amino-azoles, using methanol as a methylating agent has been accomplished in the presence of a [Cp*IrCl2]2/NaOH system. From both synthetic and environmental points of view, the reaction is highly attractive because of low catalyst loading, broad substrate scope and excellent selectivities.
[EN] PESTICIDALLY ACTIVE BI- OR TRICYCLIC HETEROCYCLES WITH SULFUR CONTAINING SUBSTITUENTS<br/>[FR] HÉTÉROCYCLES BI- OU TRICYCLIQUES À ACTION PESTICIDE AVEC SUBSTITUANTS SOUFRÉS
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2015000715A1
公开(公告)日:2015-01-08
Pesticidally active bi-or tricyclic heterocycles with sulphur-containing substituents, stereoisomers and tautomeric forms thereof that can be used as insecticides and can be prepared in a manner known per se.