当在碱性水性介质中加热时,二烷基(3-苯基丙烯-2-基)(3-苯基丙炔-2-基)-溴化铵进行分子内环化,形成N,N-二烷基-4(9)-苯基-3a, 4-二氢苯并[ f ]异吲哚鎓溴化物。环化产物在C(1)–N(2)或N(2)–C(3)键处进行碱性水溶液裂解,生成2-(二烷基氨基甲基)-3-甲基和3-的混合物(二烷基氨基甲基)-2-甲基-1-苯基萘。然而,在2,2-戊亚甲基-9-苯基-3a,4-二氢苯并-[f]异吲哚鎓溴化物的情况下,仅形成C(1)–N(2)键裂解产物。
当在碱性水性介质中加热时,二烷基(3-苯基丙烯-2-基)(3-苯基丙炔-2-基)-溴化铵进行分子内环化,形成N,N-二烷基-4(9)-苯基-3a, 4-二氢苯并[ f ]异吲哚鎓溴化物。环化产物在C(1)–N(2)或N(2)–C(3)键处进行碱性水溶液裂解,生成2-(二烷基氨基甲基)-3-甲基和3-的混合物(二烷基氨基甲基)-2-甲基-1-苯基萘。然而,在2,2-戊亚甲基-9-苯基-3a,4-二氢苯并-[f]异吲哚鎓溴化物的情况下,仅形成C(1)–N(2)键裂解产物。
Base catalysed rearrangements involving ylide intermediates. Part 6. The rearrangements of diallyl- and allyipropynyl-ammonium cations in protic media
作者:Trevor Laird、W. David Ollis、Ian O. Sutherland
DOI:10.1039/p19800001477
日期:——
aprotic solvents. The cations (15) undergo Hofmann elimination to the naphthalenic amines (12) or (13) and (14). The methiodide of amine (13g) shows a novel consequence, of restricted rotation. The n.m.r.spectrum of the methiodide shows that the two protons of the methylene group are diastereotopic.
Base-catalyzed Intramolecular Diels–Alder Cyclization of Dialkyl(3-arylprop-2-yn-1-yl)-(3-phenylprop-2-en-1-yl)ammonium Bromides in Aqueous Solution
作者:E. O. Chukhajian、L. V. Ayrapetyan、El. O. Chukhajian、H. A. Panosyan
DOI:10.1007/s10593-013-1375-1
日期:2013.12
undergo cyclization in aqueous solution in the presence of base upon prior heating to give potentially biologically active 2,2-dialkyl-6-chloro-4-phenyl-3a,4-dihydrobenzo[f]isoindolinium bromides in almost quantitative yield. Heat is released in the course of these reactions. We found that the introduction of a phenyl group at position 3 of the allyl fragment facilitates the cyclization. This is the
与二烷基(3-芳基丙-2-炔-1-基)(3-苯基丙-2-烯-1-基)溴化铵相反,它们的烯丙基类似物含有3-芳基丙-2-烯-1-基在先加热后,在碱的存在下在水溶液中进行环化,以几乎定量的产率得到潜在的具有生物活性的2,2-二烷基-6-氯-4-苯基-3a,4-二氢苯并[ f ]异吲哚鎓溴化物。在这些反应过程中放出热量。我们发现在烯丙基片段的3位上引入苯基促进了环化。这是二烷基(3-芳基丙-2-yn-1-基)铵盐的烯丙基类似物的碱催化的分子内环化的首次报道。