Regioselective Acid -Catalyzed Cyclization Reaction: Unique Synthesis of Condensed Thiazoles and Selenazole
作者:Majid. M. Heravi、Kioumars. Aghapoor、Masood. A. Nooshabadi
DOI:10.1080/00397919808005716
日期:1998.1
The facile and regioselective synthesis of condensed thiazoles 7-11 and selenazole 12 has been performed by the catalytic action of H2SO4 on corresponding propynylthio 1-5 and propynylseleno 6 derivatives respectively.
Heravi; Montazeri; Rahimizadeh, Journal of Chemical Research - Part S, 2000, # 10, p. 464 - 465
Regioselective annelation of 3-(prop-2-ynylsulfanyl)-1,2,4-benzotriazine to thiazolo[2,3-c][1,2,4]benzotriazine
作者:M. M. Heravi、K. Aghapoor、M. A. Nooshabadi、M. M. Mojtahedi
DOI:10.1007/bf00807564
日期:1997.11
Thiosemicarbazide reacted with 1,2-diaminobenzene to give 1,2-dihydro-3-thioxo-1,2,4-benzotriazine (1) in fairly good yield in a solvent free reaction under microwave irradiation. 1 was condensed with prop-2-ynyl bromide in the presence of sodium methoxide to afford the corresponding 3-(prop-2-ynylsulfanyl)-1,2,4-benzotriazine (5). Transformation of 5 to 3-methylidene-2,3-dihydro-9H-thiazolo[2,3-c][1,2,4]benzotriazine (6) was performed in the presence of a palladium salt.