Cobalt-Catalyzed Oxidative Phosphonylation of α-Amino Acid Derivatives and α-Amino Ketones for α-Aminophosphonates
作者:Zhi-Qiang Zhu、Li-Jin Xiao、Dong Guo、Xu Chen、Jiu-Jian Ji、Xiao Zhu、Zong-Bo Xie、Zhang-Gao Le
DOI:10.1021/acs.joc.8b02680
日期:2019.1.4
A novel and efficient direct oxidative phosphonylation of α-amino ketones and α-amino acidderivatives with dialkyl phosphites by the catalysis of a cobalt salt under air is disclosed. A variety of α-amino ketones and α-amino acidderivatives underwent the reaction well with dialkyl phosphites to produce the desired α-aminophosphonates. This protocol not only provides an alternative synthetic route
Iron(III)-catalyzed synthesis of selenoesters from α-amino carbonyl derivatives at room temperature
作者:Rana Chatterjee、Anindita Mukherjee、Sougata Santra、Grigory V. Zyryanov、Adinath Majee
DOI:10.1016/j.tet.2019.130624
日期:2019.10
An Fe(III)-catalyzed efficient method has been developed for the synthesis of selenoester derivatives in high yields through the coupling of α-amino carbonyl/glycine derivatives and diselenides under ambient air. A library of benzoselenoate derivatives having a variety of substituents has been synthesized. A plausible reaction pathway has been predicted. Experimental results suggest that the reaction
An efficient one-pot synthesis of substituted quinolines from alpha-arylamino ketones in the presence of PBr3 in DMF has been developed. This general protocol provides a novel and facile access to substituted quinolines by sequential Vilsmeier-Haack reaction, intramolecular cyclization and aromatization reactions of alpha-arylamino ketones. PBr3 plays a dual role in the quinoline synthesis: as a key
A visible‐light‐induced photocatalytic aerobic oxidation/[3+2] cycloaddition/aromatization cascade between secondary amines and isocyanides has been successfully developed. The reaction provides a general and efficient access to diversely substituted imidazoles and imidazo[1,5‐a]quinoxalin‐4(5 H)‐ones in good yields under mild conditions.
仲胺和异氰酸酯之间的可见光诱导的光催化需氧氧化/ [3 + 2]环加成/芳构化级联反应已成功开发。该反应可在温和条件下以高收率普遍有效地获得各种取代的咪唑和咪唑并[1,5 - a ]喹喔啉-4(5 H)-酮。
作者:J. Carlos Menéndez、Vellaisamy Sridharan、Subbu Perumal、Carmen Avendaño
DOI:10.1055/s-2005-922760
日期:——
The solid-state reaction between anilines and phenacyl bromides in the presence of an equimolecular amount of sodium bicarbonate gives N-phenacylanilines. Microwave irradiation of mixtures of these compounds with anilinium bromides at 540 W for 45-60 s provides a mild, general, and environmentally friendly method for the synthesis of 2-arylindoles in 50-56% overall yields. A one-pot variation of the method, involving irradiation of 2:1 mixtures of anilines and phenacyl bromides, was also developed, allowing a simplified experimental procedure and leading to improved yields (52-75%).