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Intramolecular iminium ene reaction with Cu(I) catalysts: Facile formation of 4-amino-3-methylenechromans from O-propargyl salicylaldehydes and dialkylamines
Arai, Noriyoshi,Ohkuma, Takeshi
experimental part, p. 1617 - 1622 (2011/04/15)
Reaction of O-propargyl salicylaldehyde and related compounds with dialkylamines in the presence of copper(I) iodide gave 4-(alkylamino)-3- methylenechroman derivatives in good yields through the loss of one alkyl group of the dialkylamine. The reaction a
