Redox Reaction of Aromatic Aldehydes with Fe<sub>3</sub>(CO)<sub>12</sub>
作者:Keiji Itoh、Saburo Nakanishi、Yoshio Otsuji
DOI:10.1246/bcsj.64.118
日期:1991.1
Aromatic aldehydes react with Fe3(CO)12 in refluxing benzene ultimately to give arylmethyl alcohols and 1,2-diaryl-1,2-ethanedione in a 1:1 ratio. In some cases, small amounts of 2,4,5-triaryl-1,3-dioxolanes are formed as minor products. Dinuclear iron complex (1,2-diphenyl-1,2-ethanedioxido)Fe2(CO)7 has been isolated as an intermediate in the reaction of benzaldehyde with Fe3(CO)12. The mechanism of this
utilized low-valent titanium reductant, titanium(II) bromide, was conveniently prepared by treating titanium(IV) bromide with hexamethyldisilane. The pinacol reaction of aromatic and aliphatic aldehydes including primary aldehydes proceeded smoothly in dichloromethane-pivalonitrile at temperatures ranging from −23 to 0 °C by the combined use of soluble titanium(II) bromide and copper to give 1,2-diols in good
新使用的低价钛还原剂溴化钛 (II) 可以通过用六甲基乙硅烷处理溴化钛 (IV) 方便地制备。芳香族和脂肪族醛(包括伯醛)的频哪醇反应在二氯甲烷-新戊腈中,通过可溶性溴化钛(II)和铜的联合使用,在 -23 至 0 °C 的温度范围内顺利进行,得到 1,2-二醇。高产率和高 dl 选择性。