An efficient synthesis of 3-cyano-3-benzoyloxyoxindoles via cyanoacylation of isatins in the presence of 4Å molecular sieves
作者:Abbas Ali Esmaeili、Saeid Amini Ghalandarabad、Mahdieh Zangouei
DOI:10.1016/j.tetlet.2012.08.014
日期:2012.10
In the presence of 4 angstrom molecular sieves in CH3CN, a process for the cyanobenzoylation and cyanocarbonylation of isatins with benzoycyanides and ethylcyanoformate under mild reaction conditions has been developed. This approach provides easy access to a wide range of 3-cyano-3-benzoyloxyoxindoles and 3-cyano-3-ethoxycarbonyloxyoxindoles in good to excellent yields. (C) 2012 Elsevier Ltd. All rights reserved.
Chemoselective phosphine-catalyzed cyanoacylation of α-dicarbonyl compounds: a general method for the synthesis of cyanohydrin esters with one quaternary stereocenter
chemoselective phosphine-catalyzed cyanoacylation of α-dicarbonyl compounds is reported. Under the catalysis of P(NMe2)3, the cyanoacylation of α-dicarbonyl compounds such as isatins, α-keto esters, and α-diketones with acyl cyanides exclusively proceeds under very mild conditions, affording a wide range of cyanohydrin esters bearing one quaternary stereocenter in moderate to excellent yields. It represents
A versatile synthesis of spirooxindolyl oxazol-2(5H)-ones via palladium(II)-catalyzed addition of arylboronic acids to nitriles is described. A wide range of spirooxindolyl oxazol-2(5H)-ones and other spirocyclic frameworks incorporating the oxazol-2(5H)-one unit can be readily prepared in good to high yields under the optimal conditions.
描述了通过钯 ( II ) 催化芳基硼酸加成到腈上来合成螺吲哚基恶唑-2(5 H )-酮的通用合成方法。在最佳条件下,可以很容易地以良好到高产率制备各种螺吲哚基恶唑-2(5 H )-酮和其他包含恶唑-2(5 H )-1单元的螺环骨架。