Aerobic oxidative cleavage of cinnamaldehyde to benzaldehyde catalyzed by metalloporphyrins under mild conditions

作者：Chen Hongyan; Ji Hongbing^*; Zhou Xiantai; Xu Jianchang; Wang Lefu

来源：Catalysis Communications, 2009, 10(6): 828-832.

DOI：10.1016/j.catcom.2008.12.007

• Aerobic oxidation
• Metalloporphyrins
• Molecular oxygen

Efficient oxidative cleavage of cinnamaldehyde to benzaldehyde catalyzed by metalloporphyrins in the presence of dioxygen has been developed. Manganese(III) meso-tetraphenylporphyrin chloride (MnTPPCl) showed excellent activity for the oxidation under mild conditions. Different influencing factors have been investigated, and 71% yield of benzaldehyde was obtained under the optimum conditions (60 degrees C, 3 h, toluene as solvent, molar ratio for cinnamaldehyde:MnTPPCl:isobutylaldehyde = 1:0.001:5). Moreover, a Plausible mechanism including free radical process and high-valent intermediate (Mn-IV=O) was proposed.

• 出版日期2009-2-15
• 单位华南理工大学; 中山大学