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A facile and inexpensive method for the synthesis of 2-substituted benzothiazoles has been developed by Na 2 S 2 O 4 -mediated cyclocondensations of 2,2'-disulfanediyldianilines with aldehydes. In the presence of Na 2 S 2 O 4 and 4 Å molecular sieves, a variety of 2-substituted benzothiazoles were obtained from the reaction of 2,2'-disulfanediyldianilines with aldehydes in moderate to high yields.

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Synthesis of 2-Substituted Benzothiazoles. -Besides compound (I) chloro substituted disulfanediyldianiline is used as starting material. -(WANG, Z.; TANG*, R.; LI, J.; Chin.

Thioethers Q 0580Hydrothiolation of Terminal Alkynes with Diaryl Disulfides and Diphenyl Diselenide: Selective Synthesis of (Z)-1-Alkenyl Sulfides and Selenides. -Special emphasis is given for the synthesis of new fipronil analogs, e.g. (XIV). -(WANG, Z.-L.; TANG*, R.-Y.; LUO, P.-S.; DENG, C.-L.; ZHONG, P.; LI, J.-H.; Tetrahedron 64 (2008) 47, 10670-10675; Coll. Chem. Mater. Sci., Wenzhou Univ., Wenzhou 325027, Peop. Rep. China; Eng.) -Nuesgen 12-090