Convenient preparation of quinones via the catalytic autoxidation of hydroquinones with nitrogen oxides
作者:Rajendra Rathore、Eric Bosch、Jay K. Kochi
DOI:10.1016/s0040-4039(00)76211-3
日期:1994.2
An efficient, inexpensive, catalytic method for the autoxidation of hydroquinones utilizes the gaseous (NOx) catalyst which allows a simple workup procedure for quinone isolation merely by solvent removal.
Bis[1,2,3,4,5,6,7,8-octahydro-1,4:5,8-di(ethano)anthryl]carbene. The first all-hydrocarbon triplet diphenylcarbene having a half-life over one second under normal conditions
作者:Hideo Tomioka、Hidetaka Itakura、Katsuyuki Hirai
DOI:10.1039/a706663e
日期:——
Bicyclo[2.2.2]octyl groups are demonstrated to be very effective kinetic protectors for triplet carbenes.
双环[2.2.2]八烷基团被证明是三重态碳烯的非常有效的动力保护剂。
Rathore, Rajendra; Bosch, Eric; Kochi, Jay K., Journal of the Chemical Society. Perkin transactions II, 1994, # 6, p. 1157 - 1166
作者:Rathore, Rajendra、Bosch, Eric、Kochi, Jay K.
DOI:——
日期:——
Novel Catalysis of Hydroquinone Autoxidation with Nitrogen Oxides
作者:E. Bosch、R. Rathore、J. K. Kochi
DOI:10.1021/jo00088a039
日期:1994.5
An efficient catalytic method is described for the preparative conversion of hydroquinones to quinones with dioxygen under mild conditions. The use of the gaseous nitrogen oxide (NOx) catalyst allows a simple workup procedure for the isolation of quinones in essentially quantitative yields by merely removing the low-boiling solvent dichloromethane in vacuo. The mechanism of the catalytic autoxidation of hydroquinones is ascribed to the critical role of nitrosonium (NO+) in the one-electron oxidation of hydroquinone, followed by the reoxidation of the reduced nitric oxide (NO) with dioxygen. An extensive series of complex interchanges among various NOx species in nitrogen-(V), -(IV), -(III), and -(II) oxidation states, coupled with stepwise oxidation of hydroquinone via a successive series of one-electron/proton transfers, form the critical components of the catalytic cycle.
Rathore Rajendra, Bosch Eric, Kochi Jay K., Tetrahedron Lett, 35 (1994) N 9, S 1335-1338