很容易从相应的噻吩基醛中获得的3-(噻吩-2-基)-和3-(噻吩-3-基)烯丙胺可以与各种酸酐和α,β-不饱和酰氯(马来酸,顺丁烯二酸)相互作用,以及苯基马来酸酐,叔丁酰和肉桂酰氯等),导致形成噻吩并[2,3- f ]异吲哚核。通常,反应顺序包括三个连续的步骤:初始烯丙胺的氮原子的酰化,分子内Diels-Alder乙烯基芳烃(IMDAV)反应以及Diels-Alder加合物中二氢噻吩环的最终芳构化。彻底研究了该方法的范围和局限性。借助X射线分析表明,关键步骤IMDAV反应通过exo进行。-过渡态,引起目标杂环的单一非对映异构体的排他形成。在马来酸酐的情况下,该方法允许获得官能取代的噻吩并[2,3- f ]异吲哚羧酸,其对于进一步转化和随后的生物筛选是潜在有用的底物。
A regio‐ and enantioselective copper‐catalyzed 1,4‐conjugateaddition of trimethylaluminium to linear δ‐aryl‐substituted α,β,γ,δ‐unsaturated alkyl ketones was developed. A series of γ,δ‐unsaturated alkyl ketones were obtained in good yields with high regio‐ and enantioselectivity (up to 88% ee and 96:4 dr). Expansion of the reaction scope to substrates containing aromatic heterocycles also afforded
Propenyl amines, processes for their production and pharmaceutical compositions containing them
申请人:SANDOZ AG
公开号:EP0000896A2
公开(公告)日:1979-03-07
The present invention provides propenylamines useful as anti-mycotic agents.
本发明提供了可用作抗霉菌剂的丙烯胺。
Spangler, Charles W.; Liu, Pei-Kang; Dembek, Alexa A., Journal of the Chemical Society. Perkin transactions I, 1991, # 4, p. 799 - 802
作者:Spangler, Charles W.、Liu, Pei-Kang、Dembek, Alexa A.、Havelka, Kathleen O.
DOI:——
日期:——
Synthesis and Structure of (E,E)-[6.2]-(2,5)thiophenophane-,5-diene: a new monomer for cyclopolymerization.
作者:Daniel T. Glatzhofer、Douglas J. Guerrero、Masood A. Khan
DOI:10.1016/s0040-4039(00)79044-7
日期:1992.5
Synthesis and characterization of the title compound (1) is described. UV and variable temperature H-1-NMR spectroscopy are used to deduce structural detail of 1 in solution and results are compared to its x-ray structure. 1 shows structural features favorable for cyclopolymerization to form polymers containing stacked aromatic rings.