Chemoselective Reduction of Sterically Demanding <i>N</i>,<i>N</i>-Diisopropylamides to Aldehydes
作者:Peihong Xiao、Zhixing Tang、Kai Wang、Hua Chen、Qianyou Guo、Yang Chu、Lu Gao、Zhenlei Song
DOI:10.1021/acs.joc.7b02868
日期:2018.2.16
EtOTf and LiAlH(OEt)3 in the absence of base were found to be optimal for reducing extremely sterically demanding 2,6-disubstituted N,N-diisopropylbenzamides. The reaction tolerates various reducible functional groups, including aldehyde and ketone. 1H NMR studies confirmed the formation of imidates stable in water. The synthetic usefulness of this methodology was demonstrated with N,N-diisopropylamide-directed
Verfahren zur Herstellung von Carbonsäureamiden durch Oxidation von aldehyden in Gegenwart von aminen
申请人:Degussa Aktiengesellschaft
公开号:EP1179525A1
公开(公告)日:2002-02-13
Verfahren zur Herstellung von mono-, bi- oder/und polyfunktionellen Amiden der Formeln (Ia) oder/und (Ib),
R1-CO-NR2R3 (Ia)
R4R5N-CO-R6-CO- NR2R3 (Ib)
aus Aldehyden und Aminen in Gegenwart eines Übergangsmetallkatalysators und einem Oxidationsmittel.
Chloroform as a Carbon Monoxide Precursor: <i>In</i> or <i>Ex Situ</i> Generation of CO for Pd-Catalyzed Aminocarbonylations
作者:Samuel N. Gockel、Kami L. Hull
DOI:10.1021/acs.orglett.5b01385
日期:2015.7.2
Conditions for the rapid hydrolysis of chloroform to carbonmonoxide (CO) using heterogeneous CsOH·H2O are described. CO and 13CO can be generated cleanly and rapidly under mild conditions and can be captured either in or ex situ in palladium-catalyzedaminocarbonylationreactions. Utilizing only 1–3 equiv of CO allows for the aminocarbonylation of aryl, vinyl, and benzyl halides with a wide variety
A new method for the direct one-pot oxidative amidation between methylarenes and amines catalyzed by copper has been developed. This method integrates methylarene oxidation and amide bond formation, which are usually accomplished separately, into a single operation. In addition, the reaction provides a relatively high yield and has a wide substrate scope. Moreover, the starting reagents are abundant
amidation between methylarenes with amines in a two-step continuous flow system. This method integrates methylarene oxidation and amide formation into a single operation which is usually accomplished separately. Oxidation with tert-butyl hydroperoxide (TBHP) as “green” oxidant, the synthesis of amides under mild reaction conditions in continuous flow system and the utilization of methylarenes as starting