Trimethylammonium-containing rhodacarborane [(9-NMe3-7,8-C2B9H10)RhCl2]2 as a catalyst for the annulation of arylcarboxylic acids with alkynes
作者:A. P. Molotkov、S. V. Timofeev、D. A. Loginov
DOI:10.1007/s11172-021-3297-x
日期:2021.10
Rhodacarborane [(9-NMe3-7,8-C2B9H10)RhCl2]2 exhibited moderate catalytic activity in the reaction of annulation of arylcarboxylic acids with alkynes, giving naphthalenes as the major products. Effects of the substituent at the carborane ligand, as well as the nature of organic substrates, on the catalytic activity and selectivity of the reaction were estimated. In particular, it was revealed that a replacement of the NMe3 group at the carborane ligand with the SMe2 one leads to a significantly decreased activity of the catalyst.
Rhodacarborane [(9-NMe3-7,8-C2B9H10)RhCl2]2 在芳基羧酸与炔烃的环化反应中表现出中等的催化活性,主要产物为萘。评估了碳硼烷配体上的取代基以及有机底物的性质对反应的催化活性和选择性的影响。特别是,研究表明,用 SMe2 基团取代碳硼烷配体上的 NMe3 基团会导致催化剂活性显着降低。