Convenient Synthesis of Highly Functionalized Pyrazolines via Mild, Photoactivated 1,3-Dipolar Cycloaddition
作者:Yizhong Wang、Claudia I. Rivera Vera、Qing Lin
DOI:10.1021/ol7017328
日期:2007.10.1
cycloaddition procedure was successfully developed for the synthesis of polysubstituted pyrazolines. This procedure involved the in situ generation of the reactive nitrile imine dipoles using a hand-held UV lamp at 302 nm, followed by spontaneous cycloaddition with a broad range of 1,3-dipolarophiles with excellent solvent compatibility, functional group tolerance, regioselectivity, and yield.
成功开发了一种温和的,光活化的1,3-偶极环加成程序,用于合成多取代的吡唑啉。该过程涉及使用302 nm的手持式紫外线灯原位生成反应性腈亚胺偶极子,然后自发环加成具有广泛范围的1,3-双亲油性化合物,具有优异的溶剂相容性,官能团耐受性,区域选择性和屈服。