Facile and Efficient Sulfenylation Method Using Quinone Mono-<i>O,S</i>-Acetals under Mild Conditions
作者:Masato Matsugi、Kenji Murata、Kentoku Gotanda、Hisanori Nambu、Gopinathan Anilkumar、Keita Matsumoto、Yasuyuki Kita
DOI:10.1021/jo001710q
日期:2001.4.1
A novel sulfenylation method induced by aromatization of quinone mono-O,S-acetals is described. These sulfenylation reagents readily react with silyl enolethers or electron rich aromatic compounds to give sulfenylation products under mild conditions. In particular, O,S-acetal 2j, which possesses a pentafluorophenylthio function, is the most effective reagent from the standpoint of the adaptability for various substrates.
Heterogeneously Catalyzed Direct CH Thiolation of Heteroarenes
The first general methodology for the directthiolation of electron‐rich heteroarenes was developed by employing Pd/Al2O3, a recoverable and commercially available heterogeneous catalyst, and CuCl2. This method represents an operationally simple approach for the synthesis of these valuable compounds. Preliminary mechanistic studies indicate a heterogeneous catalytic system, in which both metals play
通过使用Pd / Al 2 O 3(一种可回收和可商购的非均相催化剂)和CuCl 2开发了第一种富电子杂芳烃直接硫醇化的通用方法。该方法代表了用于合成这些有价值的化合物的操作简单的方法。初步的机理研究表明,多相催化体系中的两种金属在硫醇化产物的形成中起着互补的作用。