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Protonated DBU as catalyst for cascade addition–cyclization of 2-alkynylaniline and carbon disulfide
- Zhao, Peng, Liao, Qian, Gao, Hongxin, Xi, Chanjuan
- Tetrahedron letters 2013 v.54 pp. 2357-2361
- carbon disulfide, catalysts, chemical reactions, chemical structure, organic compounds, synthesis, temperature
- Protonated 1,8-diazabicyclo[5,4,0]undec-7-ene as catalyst for cascade addition/cyclization of 2-alkynylaniline and carbon disulfide has been described. This process provides a convenient route for synthesis of a variety of benzo[d][1,3]thiazine-2(4H)-thiones in high yields with high regio- and stereoselectivity at room temperature without metal.