Monohydrochloride Assisted Synthesis of Functionalized Isoxazoles and Pyrazoles from Allenic Ketones: First Synthesis of (<i>Z</i>
)-2-Methyl-7H-benzo[b]pyrazolo[5,1-d][1,5]oxazocines
作者:Debayan Sarkar、Sushree Ranjan Sahoo
DOI:10.1002/ejoc.201900008
日期:2019.3.14
A straight forward synthesis of substituted isoxazoles and pyrazoles from 1,2‐allenic ketones assisted by hydrochlorides of hydrazine and hydroxylamine is presented. In the process, the propyloxy‐phenyl pyrazoles were transformed to (Z)‐2‐methyl 7H benzo[b]pyrazolo[5,1‐d][1,5]oxazocines which are important and emissive compounds.
提出了由肼和羟胺盐酸盐辅助的1,2-烯基酮直接合成取代的异恶唑和吡唑的方法。在此过程中,丙氧基苯基吡唑被转化为(Z)-2-甲基7H苯并[b]吡唑并[5,1-d] [1,5]恶唑啉,它们是重要的发光化合物。