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.