Many are called but few are chosen: A nonheme iron complex catalyzes the oxidation of alkyl CHbonds by using H2O2 as the oxidant, showing an enhanced selectivity for secondary over tertiary CHbonds (see scheme).
Selective oxidation of unactivated C–H bonds by supramolecular control
作者:Yat-Sing Fung、Siu-Cheong Yan、Man-Kin Wong
DOI:10.1039/c2ob07069c
日期:——
Efficient methods for dioxirane-based selective C–H bond oxidation by supramolecularcontrol in H2O have been developed. With β-cyclodextrin as the supramolecular host, site-selective oxidation of the terminal over the internal tertiary C–H bond of 3,7-dimethyloctyl esters 3a–c was achieved. In addition, β-cyclodextrin selectively enhanced the C–H bond oxidation of cumene in a mixture of cumene and
超分子控制二环氧乙烷基选择性CH键选择性氧化的有效方法 高氧2已经开发了。以β-环糊精为超分子主体,实现了3,7-二甲基辛基酯3a-c内部叔C-H键末端的位点选择性氧化。此外,β-环糊精选择性地增强了C–H键的氧化枯烯 在...的混合物中 枯烯 和 乙苯 在 高氧2。通过1 H NMR研究,C–H键氧化的选择性可能归因于β-环糊精与底物之间形成的包合物。