Tandem C–O and C–N Bonds Formation Through O-Arylation and [3,3]-Rearrangement by Diaryliodonium Salts: Synthesis of N-Aryl Benzo[1,2,3]triazin-4(1H)-one Derivatives
摘要:
Metal-free O-arylation and [3, 3]-rearrangement have been shown as an efficient strategy to construct new C-O and C-N bonds in one-pot reactions. The method was used to prepare N-aryl benzo[1,2,3]triazin-4(1H)-one derivatives in good yields from N-hydroxy benzo[1,2,3]triazin-4(3H)-one and diaryliodonium salts. The reaction was tolerated a variety of sensitive functional groups such as iodine, nitro, ester, and aldehyde groups. A rational mechanism was proposed based on the experimental results, and the reaction was easily up to gram scale.
Bifunctional Phosphine Ligand-Enabled Gold(I)-Catalyzed O-Nucleophilic Addition of <i>N</i>-Hydroxybenzo[1,2,3]-triazin-4(3<i>H</i>)-ones to Alkynes Followed by [3,3]-Rearrangement: Simultaneous Formation of C–O and C–N Bonds
作者:Yongcai Xu、Kanghe Zheng、Bingwei Zhou、Hongwei Jin、Yunkui Liu
DOI:10.1021/acs.joc.0c00471
日期:2020.5.15
We describe a gold (I)-catalyzed tandem O-nucleophilic addition/[3,3]-rearrangement reaction of N-hydroxybenzo[1,2,3]-triazin-4(3H)-ones with alkynes enabled by a biphenyl-2-yl phosphine ligand featuring a pendant amide moiety (L1). A variety of 1-(2-oxo-2-arylethyl)benzo [d][1,2,3]triazin-4(1H)-one derivatives were synthesized in good to excellent yields. The present protocol gives a rare example
Catalyst comprising a nitrogen-containing heterocylic compound
申请人:Daicel Chemical Industries, Ltd.
公开号:EP1085015A2
公开(公告)日:2001-03-21
A catalyst is for use in a reaction using an oxygen-atom-containing reactant arid includes a nitrogen-containing heterocyclic compound of the following formula (1):
wherein each of R1 and R2 is, identical to or different from each other, a hydrogen atom, a halogen atom, an alkyl group, a haloalkyl group, an aryl group, a cycloalkyl group, a hydroxyl group, an alkoxy group, a carboxyl group, an alkoxycarbonyl group, or an acyl group, and R1 and R2 may be combined to form a double bond or to form an aromatic or non-aromatic ring with the adjacent two carbon atoms, where one or two of heterocyclic ring containing three nitrogen atoms indicated in the formula may be further formed on the R1 or R2, or on the double bond or aromatic or non-aromatic ring formed by R1 and R2; X is an oxygen atom or a hydroxyl group; and Y is a single bond, a methylene group, or a carbonyl group. This catalyst can introduce an oxygen-atom-containing group into an organic substrate under mild conditions.