Halonium Ion Mediated Synthesis of 2-Halomethylene-3-oxoketoxime Derivatives from Isoxazoline <i>N</i>-Oxides
作者:Mustafa J. Raihan、R. R. Rajawinslin、Veerababurao Kavala、Chun-Wei Kuo、Ting-Shen Kuo、Chiu-Hui He、Hsiu-Ni Huang、Ching-Fa Yao
DOI:10.1021/jo401283x
日期:2013.9.6
trichloroisocyanuric acid (TCCA)-mediated synthesis of novel 2-halomethylene-3-oxoketoximes via one-pot halogenation/oxidation of isoxazoline N-oxide derivatives is described here. The keto functionality of 3-ketoximes was selectively reduced by lithiumaluminum hydride to synthesize an unprecedented type of Baylis–Hillman oxime, which underwent N–O coupling to produce new isoxazoline N-oxide derivative.
本文描述了一种通过N-溴代琥珀酰亚胺(NBS)和三氯异氰尿酸(TCCA)介导的通过一锅式卤化/氧化异恶唑啉N-氧化物衍生物合成新型2-卤亚甲基-3-氧代酮肟的方案。氢化铝锂选择性地还原了3-酮肟的酮官能团,从而合成了前所未有的Baylis-Hillman肟,然后进行N-O偶联生成新的异恶唑啉N-氧化物。