Abstract
1-Dialkylamino-3-(trimethylsilyl)allenes 2a—q were obtained by conjugate addition of alkyl, vinyl, aryl, hetaryl, and silyl groups, via the respective organocuprates, to 3-(trimethylsilyl)propyne iminium triflates 1a—d. Similarly, 2-vinylidene-2,3-dihydro-1,3-benzothiazoles 4a,b were synthesized from semicyclic propyne iminium triflates 3a,b and a di-tert-butyl cuprate.
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