【摘要】 <正> 前已报道了通过全氟酰基过氧化物和硝基烷烃钠盐的单电子转移(SET)反应制备醛和酮的新反应。为了扩大该反应的适用范围,以最常见的过氧化苯甲酰(BPO)代替全氟酰基过氧化物进行反应。实验证明,BPO同样能将硝基烷烃钠盐顺利地转化为相应的醛和酮,但需要较高的反应温度(～50℃)和较长的反应时间(～4h)。更多还原

【Abstract】 The carbanions derived from nitroalkanes can be easily oxidized into aldehydes or ketones by benzoyl peroxide (BPO) in acetonitrile at 50℃. Product studies combined with ESR and IB determinations strongly support that the reactions involve an initial electron-transfer step from carbanions to BPO. The major products-aldehydes or ketones as well as benzoyl nitrites, come from fragmentation of the unstable nitroalkyl benzoate intermediates formed in cage combination of nitroalkyl and benzoyloxy radicals produced in collapse of ion-radical pair. These new reactions may serve as a synthetic route to aldehydes or ketones from nitroalkanes.更多还原