The Michael addition of lithio derivatives 2 of 1-(arylmethyl)benzotriazoles 1 to arylideneamines 3–5 gave the corresponding 1-(benzotriazol-1-yl)-2-anilino (or tosylamino)-1,2-diarylethanes 6–8. The latter were shown to undergo a double elimination reaction under the action of ButOK in DMF to afford diarylalkynes in high yields.
A. R. Katritzky and M. F. Gordeev, J. Chem. Soc., Perkin Trans. 1, 1992, 1295 DOI: 10.1039/P19920001295
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