Synthesis of Isoxazoline Derivatives Based on Nitrile Oxide Cycloaddition of Nitroso-Nitro-Enamine
作者:László András Kondacs、Mihály Viktor Pilipecz、Zoltán Mucsi、Barbara Balázs、Tamás Gáti、Miklós Nyerges、András Dancsó、Péter Nemes
DOI:10.1002/ejoc.201500905
日期:2015.11
A new and stable nitroso-nitro-enamine reagent, providing a nitrile oxide 1,3-dipole, has been treated with dipolarophiles in the course of 1,3-dipolar cycloaddition reactions to give a large number of novel isoxazolyl-pyrroline derivatives. Surprisingly, instead of the expected 2-isoxazolyl-dihydropyrrole cycloadducts, dihydropyrrol-3-one oximes were isolated as the main products in most cases. The
在 1,3-偶极环加成反应过程中,一种新的稳定的亚硝基-硝基-烯胺试剂提供了一个氧化腈 1,3-偶极,用偶极试剂处理,得到了大量的新型异恶唑基-吡咯啉衍生物。令人惊讶的是,在大多数情况下,二氢吡咯-3-酮肟被分离为主要产物,而不是预期的 2-异恶唑基-二氢吡咯环加合物。亚氨基肟部分成功转化为 3-氨基吡咯衍生物。还通过实验和理论方法研究了反应的机理和选择性[WB97XD/6-311++G(2d,2p)//B3LYP/6-311++G(2d,2p)],包括溶剂效应.