开发了一种有效的合成带有季碳中心的二氢苯并[ d ]异恶唑和二氢苯并[ d ]恶唑的方法。该反应涉及由酮肟和芳烃原位产生酮硝基中间体。已经观察到二氢苯并[ d ]异恶唑产物向相应的二氢苯并[ d ]恶唑的新颖的热重排。这些转变可耐受多种官能团,并在无过渡金属的条件下为各种二氢苯并[ d ]异恶唑和二氢苯并[ d ]恶唑提供了快速有效的方法。
HMF and furfural: Promising platform molecules in rhodium-catalyzed carbonylation reactions for the synthesis of furfuryl esters and tertiary amides
作者:Xinxin Qi、Rong Zhou、Han-Jun Ai、Xiao-Feng Wu
DOI:10.1016/j.jcat.2019.11.008
日期:2020.1
esters and tertiary amides has been developed. 5-Hydroxymethylfurfural (HMF) was used as both substrate and CO surrogate for the first time in a carbonylation reaction, and both alkyl and aryl iodides were tolerated well to afford the desired furfuryl esters in moderate to good yields. In addition, furfural was also utilized as a CO source for the synthesis of tertiary amides. A variety of tertiary amides
Transition metal‐catalyzed aminocarbonylation of aryl halides with CO and amines, pioneered by Heck and co‐workers in the 1970s, is among the most commonly employed reactions to make aromatic amides. A catalyst‐free aminocarbonylation of aryliodides with CO and amines, which simply uses photoirradiation conditions by Xe‐lamp, has now been developed. This methodology shows broad functional‐group tolerance
Divers halogenures d'aryles sont convertis catalytiquement en α-cetoamides et amides par traitement avec des amines secondaires et le monoxyde de carbone
Divershalures d'aryles sont convertis catalytiquement en α-cetoamides et amides par traitement avec des amines secondaires et le monooxyde de carbone
Synthesis of Enaminones by a Palladium-Catalyzed Four-Component Carbonylative Addition Reaction
作者:Liangguang Wang、Xiaoyu Zhou、Juan Ma、Xia Chen
DOI:10.1055/s-0036-1590976
日期:2017.12
A palladium-catalyzed carbonylative addition reaction of aryl bromides, amines, and alkynes has been developed. The reaction occurs readily in N,N-dimethylformamide with PdCl2(PPh3)2 as a catalyst to give the corresponding enaminones in medium to excellent yields. Furthermore, a mechanism for the palladium-catalyzed four-component carbonylative addition reaction is proposed.
series of palladium–NHC compounds were prepared and their catalytic activity in the double carbonylation of aryl iodides to synthesize α‐keto amides were examined. Palladium complexes bearing mixed NHC–phosphine exhibited high efficiency for the double carbonylation reaction. The effects of different solvents, base, temperature, carbonmonoxide (CO), pressure, various amine and aryl iodides were investigated