Aliphatic C−H Bond Activation Initiated by a (μ-η<sup>2</sup>:η<sup>2</sup>-Peroxo)dicopper(II) Complex in Comparison with Cumylperoxyl Radical
作者:Takahiro Matsumoto、Kei Ohkubo、Kaoru Honda、Akiko Yazawa、Hideki Furutachi、Shuhei Fujinami、Shunichi Fukuzumi、Masatatsu Suzuki
DOI:10.1021/ja809822c
日期:2009.7.8
combination of this correlation and the relatively large deuterium kinetic isotope effects (KIEs), k(2)(H)/k(2)(D) (13 for 9,10-DHA, approximately > 29 for toluene, and approximately 34 for THF at -70 degrees C and approximately 9 for AcrH(2) at -94 degrees C) indicates that H-atom transfer (HAT) from SH(n) (SD(n)) is the rate-determining step. Kinetic studies of the oxidation of SH(n) by cumylperoxyl
(mu-eta(2):eta(2)-peroxo)二铜(II)复合物,[Cu(2)(HL)(O(2))](2+) (1-O(2)),由双成核配体 1,3-双[双(6-甲基-2-吡啶基甲基)氨基甲基]苯 (HL) 支持,能够启动各种外部脂肪族底物 (SH(n)) 的 CH 键活化:10-甲基-9,10-二氢吖啶 (AcrH(2))、1,4-环己二烯 (1,4-CHD)、9,10-二氢蒽 (9,10-DHA)、芴、萘满、甲苯和四氢呋喃 (THF) ),其 CH 键解离能 (BDE) 范围从 1,4-CHD 的约 75 kcal mol(-1) 到 THF 的约 92 kcal mol(-1)。SH(n)的氧化得到多种氧化产物,如脱氢产物(SH((n-2)))、羟基化和进一步氧化的产物(SH((n-1))OH和SH((n-2)) 2))=O), 通过底物 (H((n-1))S-SH((n-1)))