Aminomethylbenzotriazoles react as effective Baylis-Hillman electrophiles with ethyl acrylate in the presence of TiCl4 at 20 degrees C to afford the corresponding benzotriazolated adducts in 66-80% yield. These adducts are (i) readily transformed to the Baylis-Hillman olefins by sodium hydride and (ii) smoothly undergo substitution of Bt with thiols.
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Tokyo Univ Sci, Fac Engn, Dept Ind Chem, Shinjuku Ku, Tokyo 1628601, JapanTokyo Univ Sci, Fac Engn, Dept Ind Chem, Shinjuku Ku, Tokyo 1628601, Japan
Hayashi, Y
Tamura, T
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Tokyo Univ Sci, Fac Engn, Dept Ind Chem, Shinjuku Ku, Tokyo 1628601, JapanTokyo Univ Sci, Fac Engn, Dept Ind Chem, Shinjuku Ku, Tokyo 1628601, Japan
Tamura, T
Shoji, M
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Tokyo Univ Sci, Fac Engn, Dept Ind Chem, Shinjuku Ku, Tokyo 1628601, JapanTokyo Univ Sci, Fac Engn, Dept Ind Chem, Shinjuku Ku, Tokyo 1628601, Japan