An Electrochemical Beckmann Rearrangement: Traditional Reaction via Modern Radical Mechanism
作者:Li Tang、Zhi‐Lv Wang、Yan‐Hong He、Zhi Guan
DOI:10.1002/cssc.202001553
日期:2020.9.18
electrochemical Beckmannrearrangement, i. e. the direct electrolysis of ketoximes to amides, is presented for the first time. Using a constant current as the driving force, the reaction can be easily carried out under neutral conditions at room temperature. Based on a series of mechanistic studies, a novel radical Beckmannrearrangementmechanism is proposed. This electrochemical Beckmannrearrangement does
NH2OH.Hcl/Bacl2: A Convenient System for Synthesis of Oximes from The Corresponding of Organic Carbonyl Compounds
作者:Farhad Talaei、Davood Setamdideh
DOI:10.13005/ojc/320334
日期:2016.6.28
Oximes have many applications in organic synthesis1. These compounds have antimicrobial, antioxidant, antitumor, anti-depressive, antiviral agents, and anticonvulsant properties2-7. Some oximation methods have been reported8. However our ongoing attentions to the development of new modified methods in organic synthesis8-15, we have investigated the oximation of a variety of carbonylcompounds with
out with DOWEX(R)50WX4/NH2OH·HCl system. The reactions were performed in ethanol to give Z‐aldoximation isomers of aldehydes and E‐oximaton of acetophenone derivatives in a perfect selectively. The oximation of compounds with two carbonyl groups was carried out selectively on one carbonyl moiety. Also, the oximation of aldehydes over ketones has been accomplished successfully by this system.