Lewis Acid or Brønsted Acid Catalyzed Reactions of Vinylidene Cyclopropanes with Activated Carbon-Nitrogen, Nitrogen-Nitrogen, and Iodine-Nitrogen Double-Bond-Containing Compounds
作者:Jian-Mei Lu、Zhi-Bin Zhu、Min Shi
DOI:10.1002/chem.200801785
日期:2009.1.12
Lewis acid or Brønsted acid catalyzed reactions of vinylidene cyclopropanes (VDCPs), 1, with activated carbon–nitrogen, nitrogen–nitrogen, and iodine–nitrogen double‐bond‐containing compounds have been thoroughly investigated. We found that pyrrolidine and 1,2,3,4‐tetrahydroquinoline derivatives can be formed in good yields in the reactions of VDCPs 1 with ethyl (arylimino)acetates 2 by a [3+2] cycloaddition
路易斯酸或布朗斯台德酸催化的亚乙烯基环丙烷(VDCPs)1与含活性炭-氮,氮-氮和碘-氮双键的化合物的反应已得到彻底研究。我们发现吡咯烷和1,2,3,4-四氢喹啉衍生物可以通过[3 + 2]环加成反应或分子内Friedel–Crafts反应途径,在VDCPs 1与(芳基)乙酸乙酯2的反应中以高收率形成。根据这些结果,我们发现含活性碳-氮和氮-氮双键的化合物,例如N-甲苯-4-磺酰基(N - Ts)亚胺5和二异丙基偶氮二羧酸酯(7),也可以与VDCP 1反应,在路易斯酸存在下以中等到良好的收率得到[3 + 2]环加成产物。当Ñ -叔丁氧羰基醛亚胺9被用作衬底,六元环加成产物10和11分别形成在中等产率在布朗斯台德酸,三氟甲磺酸(TfOH)的存在。VDCPs的反应1与Ñ -Ts-iminophenyliodinane(12)在(CuOTf)的存在下也进行了2 ⋅ ç 6 ħ 6和发现,含氮茚衍