Deprotonation from an N-Methyl Group in 2-[1-(Dimethylamino)-1-methylethyl]phenylborane Derivatives

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• 作者：Mitsuhiro Asakura ; Michinori <img src="http ; //pubs.acs.org/images/entities/Omacr.gif" border="0">ki ; and Shinji Toyota
• 刊名：Organometallics
• 出版年：2000
• 出版时间：January 24, 2000
• 年：2000
• 卷：19
• 期：2
• 页码：206 - 208
• 全文大小：91K
• 年卷期：v.19,no.2(January 24, 2000)
• ISSN：1520-6041

文摘

Reaction of 2-[1-(dimethylamino)-1-methylethyl]phenyllithium (Ar*Li) with a trialkyl borate, B(OR)₃,in the 3:1 ratio gave 1-Ar*-3,4,4-trimethyl-1,2,3,4-tetrahydro-3,1-benzazaborin as a major product togetherwith the corresponding protonated compound and theboronic acid. The structure of the hetelocyclic compoundwas determined by X-ray analysis and NMR spectroscopy. This compound is formed via the deprotonationfrom one of the N-Me groups in Ar*₂B(OR) by theremaining Ar*Li followed by the facile intramolecularcyclization between the boron and carbon atoms.