Cobalt carbonyl catalyzed reactions of disulfides: Carbonylation to thioesters and desulfurization to sulfides
作者:Shlomo Antebi、Howard Alper
DOI:10.1016/s0040-4039(00)98115-2
日期:1985.1
aromatic and benzylic disulfides react with carbonmonoxide and a catalytic amount of cobaltcarbonyl to give thioesters and carbonyl sulfide, while the presence of t-butyl peroxide results in the formation of sulfides in high yields.
has not been previously reported. Herein, direct catalytic metathesis of various thioethers was enabled by Pd acetate and tricyclohexylphosphine precursors with no additives, affording unsymmetrical thioethers. Detailed characterization and control experiments confirmed that Pd(0) nanocluster homogeneous catalysts formed in situ are the actual active species enabling this versatile direct transformation
systems. This study demonstrated a heterogeneously catalyzed system for the decarbonylation of various aryl thioesters to produce thioethers and CO by utilizing CeO2- or hydroxyapatite-supported Ni, Pd, or Rh nanoparticlecatalysts. The Ni catalysts showed high catalytic activity, while the Pdcatalysts possessed excellent functional group tolerance. The Rh catalysts were suitable for the selective decarbonylation
使用均相金属催化剂对硫酯脱羰进行了积极的研究,作为合成硫醚的一种有吸引力的方法,硫醚广泛应用于各个领域,因为脱羰理想情况下不需要添加剂,并且产生CO作为唯一的理论副产物。然而,尽管硫酯的非均相催化脱羰对于构建环境友好且实用的催化体系具有重要意义,但迄今为止尚未见报道。本研究展示了一种利用 CeO 2或羟基磷灰石负载的 Ni、Pd 或 Rh 纳米颗粒催化剂对各种芳基硫酯进行脱羰以生产硫醚和 CO 的非均相催化系统。 Ni催化剂表现出较高的催化活性,而Pd催化剂则具有优异的官能团耐受性。 Rh催化剂适用于不对称取代硫酯的选择性脱羰。