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Synthese und Eigenschaften von 1,2,4,3-Thiadiazaboretidinen. Kristallstruktur des 2,4-Di-tert-butyl-3-phenyl-1,2,4,3-thiadiazaboretidins

✍ Scribed by Habben, Carl D. ;Heine, Andreas ;Sheldrick, George M. ;Stalke, Dietmar ;Bühl, Michael ;Schleyer, Paul Von R.

Publisher: Wiley (John Wiley & Sons)
Year: 1991
Tongue: English
Weight: 380 KB
Volume: 124
Category: Article
ISSN: 0009-2940
DOI: 10.1002/cber.19911240108

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✦ Synopsis

Synthesis and Properties of 1,2,4,3-Thiadiazaboretidines. Crystal Structure of 2.4-Di-tert-butyl-bphenyl-1,2,4,3thiadiazaboretidine Reaction of sulfur diimides with alkyl(aryl)bis(methylthio)boranes leads to reductive 1,bcycloaddition of the NSN sequence with formation of the 1,2,4,3-thiadiazaboretidines 2a-g. NMR ('H, "B, I3C, "N, "Si), mass spectra and the results of the Xray analysis of 2f are reported and discussed. The "B chemical shifts have been calculated for 3-phenyl-1,2,4,3-thiadiazabor- etidine and some related model compounds by the IGLO method and correlate acceptably with the experimental values.

Wie kurzlich gezeigt'), reagiert 3,5-Dimethyl-l,2,4,3,5-trithiadiborolan mit Di-tert-butylschwefeldiimid zunachst zum

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