Synthesis of a series of novel fused pyrazolines and pyrazoles has been accomplished in good yields by regio- and diastereoselective 1,3-dipolar cycloaddition of enamines of indan-1-one 1a-c towards C-aryl-N-phenylnitrilimines 2df. The structure of the cycloadducts was elucidated by 1D and 2D NMR studies.
通过
茚-1-酮 1a-c 的烯胺与 C-芳基-N-苯基硝基
亚胺 2df 的 1,3-二极环加成反应,以良好的产率合成了一系列新型融合
吡唑啉类和
吡唑类化合物。通过一维和二维核磁共振研究阐明了环加成物的结构。