Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines

Weber L, Schnieder M, Maciel TC, Wartig HB, Schimmel M, Boese R, Bläser D (2000)
Organometallics 19(26): 5791-5794.

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Abstract
Reaction of equimolar amounts of diphenylketene with a series of 1,3-di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaboroles tBuNCH=CH-N(tBu)BX [X = Br (1a), F (1b), NH2 (1c), NMe2 (1d); Me (1e), SnMe3 (1f) CH=C(SnMe3)C6H4-4-Cl (1g)] regioselectively afforded good yields of the 1,3,2-oxazabhrolidines tBuN-CH-(CH=NtBu)C(=CPhz)OBX (2a-g). The X-ray structure analysis:of 2d revealed an essentially planar five-membered heterocycle with a long B-O bond and a strong exocyclic BN-pi bond.
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Weber L, Schnieder M, Maciel TC, et al. Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines. Organometallics. 2000;19(26):5791-5794.
Weber, L., Schnieder, M., Maciel, T. C., Wartig, H. B., Schimmel, M., Boese, R., & Bläser, D. (2000). Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines. Organometallics, 19(26), 5791-5794.
Weber, L., Schnieder, M., Maciel, T. C., Wartig, H. B., Schimmel, M., Boese, R., and Bläser, D. (2000). Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines. Organometallics 19, 5791-5794.
Weber, L., et al., 2000. Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines. Organometallics, 19(26), p 5791-5794.
L. Weber, et al., “Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines”, Organometallics, vol. 19, 2000, pp. 5791-5794.
Weber, L., Schnieder, M., Maciel, T.C., Wartig, H.B., Schimmel, M., Boese, R., Bläser, D.: Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines. Organometallics. 19, 5791-5794 (2000).
Weber, Lothar, Schnieder, Markus, Maciel, Teresinha Claudete, Wartig, Henning B., Schimmel, Michaela, Boese, Roland, and Bläser, Dieter. “Reaction of 2,3-dihydro-1H-1,3,2-diazaboroles and diphenylketene: A novel synthesis of 1,3,2-oxazaborolidines”. Organometallics 19.26 (2000): 5791-5794.
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