Synthesis of I<i>H</i>-Cyclopropal[<i>g</i>]quinoline<i>via</i>Trapping of an<i>ortho</i>-Quinodimethane
作者:Paul Müller、Jean-Pierre Schaller
DOI:10.1002/hlca.19900730512
日期:1990.8.8
1H-Cyclopropa[g]quinoline (3-aza-lH-cyclopropa[b]naphthalene; 17) was synthesized via interception of the heterocyclic ortho -quinodimethane 15 with l-bromo-2-chlorocyclopropene, followed by aromatization of the adduct 16 with t-BuOK.
Direct observation of o-xylylene (o-quinodimethane) in solution. Dimerization kinetics of some o-quinodimethanes
作者:Walter S. Trahanovsky、James R. Macias
DOI:10.1021/ja00281a069
日期:1986.10
observation of 1 in solution involved the generation of 1 by flash photolysis. Recently, the generation of o-QDM's based on the fluoride ion induced1,4-elimination from (o-(..cap alpha..-(trimethylsilyl)alkyl)-benzyl)trimethylammonium halides was reported. We now wish to report that we have found this reaction to be very fast, and it provides a simple and efficient method for generating o-QDM's under conditions
Reactivity and endo–exo Selectivity in Diels–Alder Reaction of o-Quinodimethanes. An Experimental and DFT Computational Study
作者:Cristiana Di Valentin、Mauro Freccero、Mirko Sarzi-Amadè、Riccardo Zanaletti
DOI:10.1016/s0040-4020(00)00126-5
日期:2000.4
endo-exo Selectivity in Diels-Alder cycloadditions of several o-quinodimethanes (1-4) with acrylonitrile, 2-(5H)-furanone and N-methylmaleimide has been investigated in acetonitrile solution. Transition structures of the cycloaddition of the parent o-QDM (1), (E,E)1,8-dimethyl-o-QDM (2), isoindene (3) and 2,3-dihydronaphthalene (4) with acrylonitrile and maleimide were located at both HF/6-31G* and B3LYP/6-31G* methods. Theoretical data reproduce fairly well both experimental absolute reaction rates and diastereoisomer ratios. The high endo selectivity has been rationalized mainly as a result of solvation effects (acetonitrile, PCM model) and reactant deformations. The latter is due to steric interactions. (C) 2000 Elsevier Science Ltd. All rights reserved.
Snijder, Carina S.; Jong, Johannes C. de; Meetsma, Auke, Chemistry - A European Journal, 1995, vol. 1, # 9, p. 594 - 597
作者:Snijder, Carina S.、Jong, Johannes C. de、Meetsma, Auke、Bolhuis, Fre van、Feringa, Ben L.
DOI:——
日期:——
MULLER, PAUL;SCHALLER, JEAN-PIERRE, HELV. CHIM. ACTA, 73,(1990) N, C. 1228-1232