Novel atom-economic synthesis of thioselenophosphinates via three-component reaction between secondary phosphine sulfides,elemental selenium,and amines

An efficient, general, and atom-economic synthesis of organoammonium thioselenophosphinates has been developed by exploiting a three-component reaction between secondary phosphine sulfides, elemental selenium, and various amines. The reaction proceeds under mild conditions (70–75 °C, 1 h, EtOH) to afford thioselenophosphinates in 77–94% yields.

     

An efficient synthesis of 1,5-benzothiazepines in the presence of sub-stoichiometric amount of cyanuric chloride

An efficient synthesis of 1,3-diaryl-2,3-dihydro-1,5-benzothiazepines has been developed by the reaction of various 1,3-diaryl-2-propenones with 2-aminothiophenol under thermal solvent-free conditions in the presence of a sub-stoichiometric amount of cyanuric chloride.

     

The synthesis of polymeric sulfides by reaction of dihaloalkanes with sodium sulfide

Several poly(alkylene sulfide)s have been synthesized in excellent yields from reactions of α,ω -dibromo- and/or α,ω-dichloroalkanes with sodium sulfide nonahydrate under reflux conditions. The procedure is general, simple and convenient for the production of various poly(alkylene sulfide)s and the way reaction parameters influence the properties of the polymers formed has been examined.