Silica-Supported Triptycene-Type Phosphine. Synthesis, Characterization, and Application to Pd-Catalyzed Suzuki鈥揗iyaura Cross-Coupling of Chloroarenes

详细信息    查看全文

• 作者：Tomohiro Iwai ; Shota Konishi ; Tatsuya Miyazaki ; Soichiro Kawamorita ; Natsumi Yokokawa ; Hirohisa Ohmiya ; Masaya Sawamura
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：December 4, 2015
• 年：2015
• 卷：5
• 期：12
• 页码：7254-7264
• 全文大小：703K
• ISSN：2155-5435

文摘

A silica-supported triptycene-type phosphine, Silica-TRIP, comprising a 9-phospha-10-silatriptycene (TRIP) and silica gel as a P-coordination center and a solid support, respectively, was synthesized and structurally characterized by nitrogen absorption measurements and solid-state CP/MAS NMR spectroscopy. Silica-TRIP exhibited a mono-P-ligating feature toward a Pd(II) complex, resulting in selective formation of a 1/1 Pd鈥揚 species even with an excess amount of the ligand. As a result, Silica-TRIP enabled Pd-catalyzed Suzuki鈥揗iyaura cross-coupling reactions of chloroarenes under mild conditions, regardless of the moderate electron-donating nature of the triarylphosphine-based ligand.