Unexpected results from the re-investigation of the Beckmann rearrangement of ketoximes into amides by using TsCl
作者:Hong-Jun Pi、Jin-Dong Dong、Na An、Wenting Du、Wei-Ping Deng
DOI:10.1016/j.tet.2009.07.036
日期:2009.9
commercially available organosulfonyl chloride, has been widely used as a stoichiometric dehydrogenation reagent in the transformation of ketoximes into corresponding amides via the Beckmannrearrangement. It has been now found to catalyze the Beckmannrearrangement with high catalytic efficiency, converting a wide range of ketoximes into their corresponding amides under mild condition with good to
A Mild and Highly Efficient Catalyst for Beckmann Rearrangement, BF3·OEt2
作者:Na An、Hongjun Pi、Lifeng Liu、Wenting Du、Weiping Deng
DOI:10.1002/cjoc.201190193
日期:2011.5
BF3·OEt2 (Borontrifluoride etherate), an inexpensive and commercially easily available Lewis acid stoichiometrically employed for Beckamann rearrangement in general, was now found to efficiently catalyze Beckmannrearrangement of ketoximes into their corresponding amides (up to 99% yield) in anhydrous acetonitrile under reflux temperature.
Facile AlCl<sub>3</sub>-Promoted Catalytic Beckmann Rearrangement of Ketoximes
作者:Li-Feng Liu、Hua Liu、Hong-Jun Pi、Shuo Yang、Min Yao、Wenting Du、Wei-Ping Deng
DOI:10.1080/00397911003629416
日期:2011.1.31
Abstract Aluminum chloride, an inexpensive and commercially available Lewis acid traditionally employed for Beckmannrearrangement with stoichiometric amounts, has been now found to smoothly promote the Beckmannrearrangement of various ketoximes to the corresponding amides (up to 99% of yield) with 10 mol% catalyst loading in anhydrous acetonitrile under reflux temperature.
A series of pyrroloisoquinoline-1,3-diones has been synthesized using ruthenium(II) as the catalyst and oxygen as the oxidant in a straightforward manner. The reaction proceeds through a tandem C–C/C–N bond formation process between maleimides and ketoximes, providing a directapproach for the synthesis of the titled products. This operationally simple reaction procedure supplies suitable conditions
Curious oxygen effect on photosensitized electron-transfer reactions of benzophenone oxime O-methyl ethers: one-way photoisomerization of an iminic double bond
Under an oxygen atmosphere, the E and Z isomer ratio of N-methoxy-4-methoxyphenyl-4′-methylphenylmethanimine (initially, [E]/[Z]=1/1) reached 4/96 upon irradiation (>360 nm) of 9,10-dicyanoanthracene (DCA) as a photosensitizer in acetonitrile.
在氧气氛下,N-甲氧基-4-甲氧基苯基-4'-甲基苯基甲亚胺的E和Z异构体比例(最初为[ E ] / [ Z ] = 1/1)在照射(> 360 nm)时达到4/96 9,10-二氰基蒽(DCA)作为乙腈中的光敏剂。