Facile Access to Unprecedented Electron-Precise Monohydrodiboranes(4), cis-1,2-Dihydrodiboranes(4), and a 1,1-Dihydrodiborane(5)

详细信息    查看全文

• 作者：Dr. Merle Arrowsmith ; Prof.Dr. Holger Braunschweig ; Dr. Krzysztof Radacki ; Torsten Thiess and Arthur Turkin
• 刊名：Chemistry - A European Journal
• 出版年：2017
• 出版时间：February 10, 2017
• 年：2017
• 卷：23
• 期：9
• 页码：2179-2184
• 全文大小：935K
• ISSN：1521-3765

文摘

2,3-Bis(dimethylamino)-substituted B₂N₂C₂ heterocycles underwent selective dimethylamino/hydride exchange with either one or two equivalents of BH₃⋅SMe₂ to give the corresponding cyclic monohydrido- or (cis)1,2-dihydridodiboranes(4), respectively. Upon either heating or irradiation in solution, the latter underwent ring contraction to the corresponding five-membered BN₂C₂ heterocycles, whereas irradiation of the 1,2-dimethylaminoethene-supported 1,2-dihydridodiborane(4) in the presence of PEt₃ gave an unprecedented unsymmetrical 1,1-dihydrodiborane(5) phosphine adduct.