title: 1,3-Dipolar cycloaddition reactions of vinylidenecyclopropane-diesters with aromatic diazomethanes generated in situ.
abstract: 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.
authors.affiliation: State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wu
authors.forename: Min
authors.initials: M
authors.lastname: Shi