Dioxygen-Promoted Pd-Catalyzed Aminocarbonylation of Organoboronic Acids with Amines and CO: A Direct Approach to Tertiary Amides
作者:Long Ren、Xinwei Li、Ning Jiao
DOI:10.1021/acs.orglett.6b02913
日期:2016.11.18
A direct approach from organoboronic acids and amines to tertiary amides via Pd-catalyzed aerobic aminocarbonylation has been developed. The presence of O2 significantly promotes the efficiency of this transformation. This method uses commercially available organoboronic acids and cheap CO and O2 (1 atm), which renders amides an easy synthesis with broad substrate scope and high functional group tolerance
Novel quenchers for solution phase parallel synthesis
作者:Sham S. Nikam、Brian E. Kornberg、Stephanie E. Ault-Justus、Michael F. Rafferty
DOI:10.1016/s0040-4039(97)10781-x
日期:1998.3
The bifunctionality of amino acids can be exploited by utilizing them as quenchers in rapid solutionphaseparallelsynthesis. The amino group was used to covalently trap the excess electrophiles, whereas the carboxylic acid moiety was used to solubilize the derivatized amino acid in water. As a prototype we used potassium sarcosinate as a quencher for excess electrophiles in the acylation or sulfonation
Activation of carboxylic acids by Burgess reagent: an efficient route to acyl ureas and amides
作者:Derek Wodka、Michael Robbins、Ping Lan、Rogelio L. Martinez、John Athanasopoulos、Gergely M. Makara
DOI:10.1016/j.tetlet.2006.01.015
日期:2006.3
Carboxylic acids upon treatment with Burgess reagent are converted to novel mixed sulfocarboxy anhydrides. Subsequent treatment of such mixed anhydrides with amines at elevated temperatures yields acyl ureas and amides. The ratio of the two products appears to be temperature controlled. The method provides a simple and convenient route to diverse acyl ureas starting from carboxylic acids and amines