Multiple Roles of the Pyrimidyl Group in the Rhodium‐Catalyzed Regioselective Synthesis and Functionalization of Indole‐3‐carboxylic Acid Esters
作者:Hui Jiang、Shang Gao、Jinyi Xu、Xiaoming Wu、Aijun Lin、Hequan Yao
DOI:10.1002/adsc.201500769
日期:2016.1.21
A regioselective synthesis of indole‐3‐carboxylic acid esters from anilines and diazo compounds has been realized by making use of the pyrimidyl group‐assisted rhodium‐catalyzed CH activation and CNbond formation. The reaction proceeds under mild conditions, exhibits good functional group tolerance and scalability. Reutilization of the pyrimidyl directing group in the resulting products provided
α-Diazosulphones and related compounds from the base-induced cleavage of α-diazo-β-ketosulphones
作者:D. Hodson、G. Holt、D. K. Wall
DOI:10.1039/j39680002201
日期:——
sulphonylformaldehyde hydrazones (70—80%), a previously unknown class of compounds, which arose by hydrolysis of the first formed phosphazine. The acylsulphonyldiazomethanes were prepared by the action of toluene-p-sulphonylazide and triethylamine on β-ketosulphones in 60% aqueous ethanol. If the diazoketosulphone is retained in solution and the reaction period prolonged, sulphonylformaldehyde hydrazones may be
Rh(III)-Catalyzed Redox-Neutral Annulation of Primary Benzamides with Diazo Compounds: Approach to Isoquinolinones
作者:Youzhi Wu、Peng Sun、Kaifan Zhang、Tie Yang、Hequan Yao、Aijun Lin
DOI:10.1021/acs.joc.5b02824
日期:2016.3.4
Reported herein is a Rh-catalyzed redox-neutralannulation of primary benzamides with diazo compounds, representing an efficient and economic protocol to isoquinolinones. The procedure exhibited good functional group tolerability, scalability, and regioselectivity, obviating the need for oxidants, and only environmentally benign N2 and H2O were released. Further utilization of the method provided an
Regioselective synthesis of multisubstituted isoquinolones and pyridones via Rh(<scp>iii</scp>)-catalyzed annulation reactions
作者:Liangliang Shi、Ke Yu、Baiquan Wang
DOI:10.1039/c5cc05977a
日期:——
A mild and efficient Rh(III)-catalyzedregioselective synthesis of isoquinolones and pyridones has been developed. The protocol uses readily available N-methoxybenzamide or N-methoxymethacrylamide and diazo compounds as the starting materials. The...