Copper-catalyzed oxidative esterification of ortho-formyl phenols without affecting labile formyl group
作者:Yong Zheng、Wei-Bin Song、Li-Jiang Xuan
DOI:10.1016/j.tetlet.2015.06.024
日期:2015.7
A copper-catalyzed oxidativeesterification of ortho-formyl phenols with aldehydesusing TBHP as oxidant in water is developed. Besides aromatic and aliphatic aldehydes, benzylic alcohols are also suitable for this reaction. The sensitive formyl group remains intact under oxidative conditions. This method provides an alternative protocol for classical esterification reactions.
A new directing group assisted method for the synthesis of aryl esters is described. In this Cu(II)-mediated reaction, 2-formylphenols and 2-acetylphenols are easily converted to the aryl esters by treatment with a new aroylating agent 2-bromoacetophenone. In addition, a new external bromine free method for the synthesis of important synthons 2,2-dibromoacetophenones from 2-bromoacetophenones is described
Aldehyde Capture Ligation for Synthesis of Native Peptide Bonds
作者:Monika Raj、Huabin Wu、Sarah L. Blosser、Marc A. Vittoria、Paramjit S. Arora
DOI:10.1021/jacs.5b03538
日期:2015.6.3
reactions for amide bondformation have transformed the ability to access synthetic proteins and other bioconjugates through ligation of fragments. In these ligations, amide bondformation is accelerated by transient enforcement of an intramolecular reaction between the carboxyl and the amine termini of two fragments. Building on this principle, we introduce an aldehyde capture ligation that parlays
ALDEHYDE CAPTURE LIGATION TECHNOLOGY FOR SYNTHESIS OF AMIDE BONDS
申请人:New York University
公开号:US20170247324A1
公开(公告)日:2017-08-31
The present invention relates to ligation agents and their use in making an amide ligation product. Methods of making the ligation agents are also disclosed.
本发明涉及连接剂及其在制备酰胺连接产物中的应用。还公开了制备连接剂的方法。
Metal-free synthesis of aryl esters by coupling aryl carboxylic acids and aryl boronic acids
A facile synthesis of aryl esters is developed by coupling aryl carboxylicacids and aryl boronicacids in the presence of PhI(OAc)2 and carbonyl diimidazole. A wide range of functional groups were tolerant to the metal-free reaction condition that led to the desired products in good yields.