Cu–Ag/hydrotalcite catalysts for dehydrogenative cross-coupling of primary and secondary benzylic alcohols. Issue 29 (2nd March 2016)

• Record Type: Journal Article
• Authors: Xu, Jin; Yue, Hongmei; Liu, Sheng; Wang, Hanfei; Du, Yuqun; Xu, Chunli; Dong, Wensheng; Liu, Chunling
• Is Part Of: RSC advances. Volume 6:Issue 29(2016)
• Page Start: 24164
• Page End: 24174
• Publication Date: 2016-03-02
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra22542f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The development of new and inexpensive heterogeneous catalysts for direct C–C cross-coupling of primary and secondary alcohols is a challenging goal and has great importance in academic and industrial sectors. Abstract : The development of new and inexpensive heterogeneous catalysts for direct C–C cross-coupling of primary and secondary alcohols is a challenging goal and has great importance in academic and industrial sectors. In this work Cu–Ag/hydrotalcite (Cu–Ag/HT) catalysts were prepared and tested for their impact on this cross-coupling. The effect of supports, including MgO, γ-Al2 O3 and HT with different Mg : Al molar ratios, was investigated. It was found that the acidic or basic properties of the supports affected product selectivity. The roles of Cu and Ag sites in the cross-coupling were also investigated with the prepared Cu–Ag/HT catalyst demonstrating high activity and selectivity for the reaction. The yield-to-target product of β-phenylpropiophenone reached 99% after 1 h under optimum reaction conditions. The stability in air and reusability studies show that Cu–Ag/HT can be stored for 6 days and can be used five times without apparent deactivation, respectively.