81720-50-5Relevant articles and documents
Reactions of Multiple Bond Systems with the 1,2,4-Trithia-3,5-diborolane Ring
Habben, Carl,Maringgele, Walter,Meller, Anton
, p. 43 - 53 (2007/10/02)
3,5-Dibromo-1,2,4-trithia-3,5-diborolane reacts with alkynes to give Δ4-2-bromo-1,3,2-dithiaborolenes.As a by-product in the reaction to form Δ4-2-bromo-4-phenyl-1,3,2-dithiaborolene the Δ2,5-4-bromo-2,6-diphenyl-1,4-thiaboracyclohexadiene is formed.Vinyltrimethylsilane reacts with 3,5-dimethyl-1,2,4-trithia-3,5-diborolane to yield the 2-methyl-4-trimethylsilyl-1,3,2-dithiaborolane.The bromine atom in these compounds can be substituted by lithium alkyls, by secondary as well as lithiated primary amines or by lithiohexamethyldisilazane.Starting from Δ4-2-t- butylamino-4-phenyl-1,3,2-dithiaborolene and heterocycles containing boron bromine functions, diborylamines are obtained.Isocyanates and di-i-propylcarbodiimide, respectively, react with 3,5-dimethyl-1,2,4-trithia-3,5-diborolane by formation of 5-methyl-1,4-dithia-2-azacyclopentanthiones(3) or of -pentanones(3). 3,5-Dimethyl-1,2,4-trithia-3,5-diborolane reacts with o-acetylaminophenol to give 3-acetyl-2-methyl-4,5-benzo-1-oxa-3-aza-2-boracyclopentane. 1H, 11B, 13C NMR, mass and IR spectra are reported. - Keywords: Δ4-1,3,2-Dithiaborolenes, Δ2,5-1,4-Thiaboracyclohexadienes, 2-Methyl-4-trimethylsilyl-1,3,2-dithiaborolane, NMR Spectra
