1,3-Dipolar Cycloaddition Reactions of Vinylidenecyclopropane-Diesters with Aromatic Diazomethanes Generated in Situ
作者:Lei Wu、Min Shi
DOI:10.1021/jo100105k
日期:2010.4.2
1,3-Dipolar cycloaddition reactions of VDCP-diesters with aromatic diazomethanes generated in situ from the corresponding aromatic aldehydes and tosylhydrazine mediated by base produce pyrazole derivatives in good yields under mild conditions. A plausible reaction mechanism has been proposed on the basis of control experiments along with the discussion on the regioselectivity.
VDCP-二酯的1,3-偶极环加成反应与相应的芳族醛和甲苯磺酰肼经碱原位生成的芳族重氮甲烷在温和的条件下以良好的收率合成吡唑衍生物。在控制实验的基础上,结合区域选择性的讨论,提出了一种合理的反应机理。