Synthesis of 6‐Cycloalkyl‐2(3<i>H</i>)‐benzoxazolones and Benzoxathiazolones via 6‐Tri‐N‐butyltin Intermediates
作者:P. Carato、Z. Moussavi、S. Yous、J.‐H. Poupaert、N. Lebegue、P. Berthelot
DOI:10.1081/scc-200025620
日期:2004.1.1
Abstract Friedel–Crafts acylation of highly activated aromatic nuclei is rendered difficult by the fact that extensive complexation of the substrate by the Lewis acid catalyst inevitably takes place, which deactivates more or less completely such reagents. 2(3H)‐benzoxazolones and their sulfur bioisosters were chosen as model molecules in an effort to search for an efficient alternative method to the
摘要 由于路易斯酸催化剂不可避免地发生底物的广泛络合,这或多或少地使此类试剂完全失活,因此使高度活化的芳香核的弗里德尔-克拉夫茨酰化变得困难。选择 2(3H)-苯并恶唑酮及其硫生物异构体作为模型分子,以寻找一种有效的 Friedel-Crafts 反应替代方法。6-环烷基羰基-3-甲基-2(3H)-苯并恶唑酮和苯并噻唑酮不能通过经典的Friedel-Crafts方法合成,可以通过三丁基锡中间体快速获得,以良好的收率提供所需的化合物。