Ruthenium Catalyzed Intramolecular C–S Coupling Reactions: Synthetic Scope and Mechanistic Insight
作者:Shivani Sharma、Ramdas S. Pathare、Antim K. Maurya、Kandasamy Gopal、Tapta Kanchan Roy、Devesh M. Sawant、Ram T. Pardasani
DOI:10.1021/acs.orglett.5b03185
日期:2016.2.5
A ruthenium catalyzed intramolecular C–S coupling reaction of N-arylthioureas for the synthesis of 2-aminobenzothiazoles has been developed. Kinetic, isotope labeling, and computational studies reveal the involvement of an electrophilic ruthenation pathway instead of a direct C–H activation. Stereoelectronic effect of meta-substituents on the N-arylthiourea dictates the final regioselective outcome
已开发出钌催化的N-芳基硫脲的分子内C–S偶联反应,用于合成2-氨基苯并噻唑。动力学,同位素标记和计算研究表明亲电钌化途径的参与,而不是直接的C–H活化。间取代基对N-芳基硫脲的立体电子效应决定了反应的最终区域选择性结果。