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4,4-Bis(trifluoromethyl) substituted 1-oxa-3-azabuta-1,3-dienes (1) and alkynes react to give open-chain trifluoromethyl substituted N-propargylic amides (4), 4H-1,3-oxazines (5) and 2-oxazolines (6, 7), respectively. The selectivity of the reaction can be controlled effectively by the reaction conditions used.

zeitschrift für naturforschung b

Reaktionen 4,4-Bis(trifluormethyl)-substituierter Heterodiene mit Alkinen / Reactions of 4,4-Bis(trifluoromethyl) Substituted Heterodienes with Alkynes: Teil 1: Reaktionen von 4,4-Bis(trifluormethyl)-1-oxa-3-azabuta-1,3-dienen mit Alkinen / Part 1: Reactions of 4,4-Bis(trifluoromethyl)-1-oxa-3-azabuta-1,3-dienes with Alkynes