118644-10-3Relevant academic research and scientific papers
Structure and Reactivity of Isoannellated Heterocyclic Systems with 4n?- and (4n+2)?-Electrons, XIV. Tri- and Tetracyclic Hetarenes with Localized or Delocalized Pyrrole Units
Kreher, Richard P.,Hildebrand, Thomas
, p. 125 - 131 (2007/10/02)
2,7-Di-tert-butyl-2,7-dihydro-benzodipyrrole (2b) and 2,5,8-Tri-tert-butyl-5,8-dihydro-2H-benzotripyrrole (3b) have been prepared by acetolysis of the corresponding tri- and tetracyclic N-oxides, isolated in crystallinic form and characterized by spectroscopic data.The scope of the N-oxide route is documented and the existence of benzo-annellated pyrroles is proofed.The stabilizing effect of the tert-butyl group is presumably supported by the vicinal annellated heterocycles. - Keywords: Benzo-annellated Di- and Tripyrroles, Synthesis, Isolation, Spectroscopic Properties, Cycloaddition reactions
A Retro-malonate Addition Reaction: Synthesis of 3,4-Condensed Heteroaromatic Pyrroles
Sha, Chin-Kang,Tsou, Chiu-Peng,Li, Yu-Chang,Lee, Ren-Sheng,Tsai, Fu-Yuan,Yeh, Ren-Hwa
, p. 1081 - 1083 (2007/10/02)
Treatment of bromo alkylidenemalonates (1)-(4) with ammonia or amines afforded 3,4-condensed heteroaromatic pyrroles (5)-(8) in excellent yields; benzotripyrroles (19)-(21) were synthesized by the same method.
