Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane

Weber L, Wartig HB, Stammler H-G, Neumann B (2001)
Organometallics 20(24): 5248-5250.

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Abstract
Reaction of equimolar amounts Of Me3SiC(N-2)Li with the 2-bromo-2,3-dihydro-1H-1,3,2-diaza-borolederivatives tBuNCH=CHN(tBu)BBr (1), EtN-C(CH=CH-CH=CH)CN(Et)BBr (3), and tBuNCH=C(CH=CH-CH=CH)N-B-Br (5) afforded the 1,3,2-diazaborolyldiazomethanes tBuNCH=CHN(tBu)B-C(N-2)SiMe3 (2), EtN-C(CH=CH-CH=CH)C-AT(Et)B-C(N-2)SiMe3 (4), and tBuNCH=C(CH=CH-CH=CH)N-B-C(N-2)SiMe3 (6). The X-ray structure analysis of 2 revealed a planar five-membered heterocycle which is linked to the carbon atom of the diazomethyl unit via a B-C single bond. pi -Interactions between this carbon atom and the boron atom can thus be excluded.
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Weber L, Wartig HB, Stammler H-G, Neumann B. Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane. Organometallics. 2001;20(24):5248-5250.
Weber, L., Wartig, H. B., Stammler, H. - G., & Neumann, B. (2001). Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane. Organometallics, 20(24), 5248-5250.
Weber, L., Wartig, H. B., Stammler, H. - G., and Neumann, B. (2001). Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane. Organometallics 20, 5248-5250.
Weber, L., et al., 2001. Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane. Organometallics, 20(24), p 5248-5250.
L. Weber, et al., “Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane”, Organometallics, vol. 20, 2001, pp. 5248-5250.
Weber, L., Wartig, H.B., Stammler, H.-G., Neumann, B.: Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane. Organometallics. 20, 5248-5250 (2001).
Weber, Lothar, Wartig, Henning B., Stammler, Hans-Georg, and Neumann, Beate. “Synthesis and Structure of Stable α-Boranyl-diazomethanes: 1,3-Di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaborolyl(trimethylsilyl)diazomethane and 1,3-diethyl-2,3-dihydro-1H-1,3,2-benzodiazaborolyl(trimethylsilyl)diazomethane”. Organometallics 20.24 (2001): 5248-5250.
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