Efficient one pot and chemoselective synthesis of functionalized 3-bromo-4,5-dihydroisoxazole derivatives via 1,3-dipolar cycloaddition reactions of nitrile oxides
作者:Abdolali Alizadeh、Atefeh Roosta、Reza Rezaiyehrad、Mohammadreza Halvagar
DOI:10.1016/j.tet.2017.10.003
日期:2017.11
A novel, metal-free and chemoselective approach for the synthesis of 4,5-dihydroisoxazole derivatives has been developed by the reaction of readily accessible starting materials including 4-oxo-4H-chromene-3-carbaldehyde, 1-phenyl-2-(1,1,1-triphenyl-λ5-phosphanylidene)ethan-1-one and dibromoformaldoxime under mild conditions in the presence of KHCO3.
通过易于获得的起始原料(包括4-氧代-4 H-色烯-3-甲醛,1-苯基-2-基)的反应,开发了一种新颖的,无金属且化学选择性的合成4,5-二氢异恶唑衍生物的方法(1,1,1-三苯基λ 5 -phosphanylidene)乙烷-1-酮在KHCO存在温和的条件下和二溴甲醛肟3。