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Thioethers Thioethers P 0430 N-Bromosuccinimide-dimercaptoethane Cobromination of Alkenes: Synthesis of β,β'-Dibromodithioethers. -Alkenes (I) and (IV) react with NBS and dimercaptoethane (II) to afford the corresponding β,β'-dibromodithioethers (III) and (V). Bromine and (II) are added to the terminal olefins in an anti-Markovnikov fashion (some yields not given). -(YOUNES, M. R.; CHAABOUNI*, M. M.; BAKLOUTI, A.; Tetrahedron Lett. 44 (2003) 28, 5263-5265; Ec. Super. Ind. Aliment., 1003 Tunis, Tunisia; Eng.) -M. Paetzel 41-079

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The synthesis of bis(oxazolidinone)polyoxyethylene derivatives 2a -h from oligoethylene glycols diglycidyl ethers 1a -e and isocyanates is reported. The reaction was achieved by lithium bromide and tributylphosphine oxide. These bis-oxazolidinones may have important antibacterial activity.