Density Functional and Kinetic Monte Carlo Study of Cu-Catalyzed Cross-Dehydrogenative Coupling Reaction of Thiazoles with THF

作者：Cai, Yuping; Zhang, Sheng'en; Xue, Yunsheng; Jiang, Juli; Chen, Zhao-Xu^*

来源：Journal of Organic Chemistry, 2016, 81(5): 1806-1812.

DOI：10.1021/acs.joc.5b02503

• DIRECT ARYLATION
• H AMINATION
• BOND
• MECHANISM
• NITROGEN
• AZOLES
• BENZOTHIAZOLES
• BENZOXAZOLES
• SELECTIVITY
• CLEAVAGE

Cu-catalyzed cross-dehydrogenative coupling (CDC) reaction of thiazoles with THF has been studied with the density functional theory method and kinetic Monte Carlo (kMC) simulations. Our results show that the previously proposed concerted metalation-deprotonation mechanism is unfavorable. On the basis of the DFT calculation and kMC simulation results, a new mechanism is proposed. In the favorable mechanism, the Cu(II) catalyst first combines with the thiazoles, forming an organocopper species that then binds to the THF radical. The rate -limiting step, C-C bond formation, is realized through an intramolecular structural rearrangement. The Cu catalyst works as a matchmaker to render the C-C bond formation. Kinetic Monte Carlo simulations demonstrate that one should be careful with the conclusions drawn simply from the calculated barriers.

• 出版日期2016-3-4
• 单位徐州医科大学; 南京大学