Reaction of 2,3-Dihydro-1<i>H</i>-1,3,2-diazaboroles and Diphenylketene: A Novel Synthesis of 1,3,2-Oxazaborolidines
作者:Lothar Weber、Markus Schnieder、T. Claudete Maciel、Henning B. Wartig、Michaela Schimmel、Roland Boese、Dieter Bläser
DOI:10.1021/om000757z
日期:2000.12.1
Reaction of equimolar amounts of diphenylketene with a series of 1,3-di-tert-butyl-2,3-dihydro-1H-1,3,2-diazaboroles [X = Br (1a), F (1b), NH2 (1c), NMe2 (1d), Me (1e), SnMe3 (1f), CHC(SnMe3)C6H4-4-Cl (1g)] regioselectively afforded good yields of the 1,3,2-oxazaborolidines (2a−g). The X-ray structure analysis of 2d revealed an essentially planar five-membered heterocycle with a long B−O bond and a
等摩尔量的二苯乙烯酮与一系列1,3-二叔丁基-2,3-二氢-1 H -1,3,2-二氮杂硼烷[X = Br(1a),F(1b),NH 2(1c),NMe 2(1d),Me(1e),SnMe 3(1f),CH C(SnMe 3)C 6 H 4 -4-Cl(1g)]区域选择性地提供了1,3, 2-恶唑硼烷(2a - g)。2D的X射线结构分析 揭示了一个基本平面的五元杂环,具有长的B-O键和强的环外BN-π键。