[EN] 3-HYDROXY-4-OXO-1,2,3-TRIAZINES AND DERIVATIVES THEREOF FOR AMIDE AND ESTER BOND FORMATION<br/>[FR] 3-HYDROXY-4-OXO-1,2,3-TRIAZINES ET LEURS DERIVES POUR LA FORMATION DE LIAISONS AMIDE ET ESTER
申请人:FRUTAROM LTD
公开号:WO2005007634A1
公开(公告)日:2005-01-27
The present invention relates to the use of a compound of formula I as a coupling reagent in forming amide or ester bonds from a reaction between a carboxylic acid and an amine or an alcohol, respectively. The compounds of formula I are especially useful as coupling reagents in the preparation of peptide bonds during peptide synthesis. In particular, the compounds of formula I are useful in promoting the formation of reactive reaction intermediates, inhibiting side reactions and in suppression of racemization. In addition, the present invention provides novel compounds of Formula I, and salts of N-oxides thereof.
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