J. Schlegel et G. Maas, Synthesis of 1-amino-3-(trimethylsilyl)allenes by organocuprate addition to 3-(trimethylsilyl)propyne iminium salts, J PRAK CH C, 342(3), 2000, pp. 235-239
1-Dialkylamino-3-(trimethylsilyl)allenes 2a-q were obtained by conjugate ad
dition of alkyl, vinyl, aryl, hetaryl, and silyl groups, via the respective
organocuprates, to 3-(trimethylsilyl)propyne iminium triflates 1a-d. Simil
arly, 2-vinylidene-2,3-dihydro-1,3-benzothiazoles 4a,b were synthesized fro
m semicyclic propyne iminium triflates 3a,b and a di-tert-butyl cuprate.