96631-72-0Relevant articles and documents
SYNTHESIS OF DIHYDRO-1H-PYRROLO- AND TETRAHYDROPYRIDOINDOLES VIA A MODIFIED MADELUNG REACTION
Verboom, W,Orlemans, E.O.M.,Berga, H.J.,Scheltinga, M.W.,Reinhoudt, D.N.
, p. 5053 - 5064 (2007/10/02)
1-(2-Methylphenyl)lactams 9, having different electron -withdrawing groups at the benzylicposition, cyclize under the influence of sodium hydride or potassium tert-butoxyde.Depending on the ring size of the lactam moiety dihydropyrrolo- (10), tetrahydropyridoindole (11), or dihydro-1H-1-benzazepine (12) derivatives are formed.Pyrroloindole 10c has been converted into the corresponding quione 15b.Starting from naphthaleneacetonitrile 20, prepared in 5 steps from 2,3-dichloronaphthoquinone, the 5,10-dioxo-1H-pyrollobenzindole 22 is obtained upon treatment with base and subsequent oxidation of the protected hydroquinone function with ceric ammonium nitrate.