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An Expedient in situ Preparation of Symmetrical 1,4-Dibenzylpiperazines from Benzyl Bromides and 2-Bromoethylamine Hydrobromide
A straightforward synthesis of a variety of 1,4-bis-benzylpiperazines from benzyl halides and 2-bromoethylamine hydrobromide is described.
β-Nitrostyrenes as Electrophiles in Parham Cyclization Chemistry. Reaction with o-Lithiobenzonitrile
β-Nitrostyrenes react with o-lithiobenzonitrile, generated from the requisite aryl bromide at −100 °C by bromine–lithium exchange with n-butyllithium in THF, to afford 2-nitro-3-phenyl-3H-inden-1-ylamines resulting from ...