Low-Valent Titanium Promoted Self-Coupling of N-Acylbenzotriazoles and Their Cross-Coupling with Diarylketones

Abstract

The self-coupling reaction of N-acylbenzotriazoles and their cross-coupling with diarylketones promoted by Sm/TiCl₄ system were investigated. Self-coupling reaction could afford α-diketones or benzoins in moderate yields, while the cross-coupling reaction gave 1,2,2-triaryl ethanones in good yields.

Keywords:

• N-Acylbenzotriazole
• Self-coupling
• Cross-coupling
• Diarylketone
• 1,2,2-Triaryl ethanone
• Low-valent titanium

Acknowledgment

We are grateful to the National Natural Science Foundation of China (Project No. 20072033) and the NSF of Zhejiang Province, China for financial support.