Synthesis and properties of bis(2-heteroaryl)borane derivatives

被引:0
|
作者
Köhler, T [1 ]
Faderl, J [1 ]
Pritzkow, H [1 ]
Siebert, W [1 ]
机构
[1] Heidelberg Univ, Inst Anorgan Chem, D-69120 Heidelberg, Germany
关键词
boranes; porphyrinogens; lithiation; Grignard reaction; bromination;
D O I
暂无
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The reaction of (isopropyloxy)bis(2-thienyl)borane (1d) with Grignard reagents leads to methylbis(2-thienyl)borane (1e) and to phenylbis(2-thienyl)borane (1f). Treatment of mono-lithiated heterocycles with dichloroboranes yields the bis(2-heteroaryl)boranes 1b, 1c, and 3a, which are dibrominated with NBS to give the 5,5'-dibromo products 1b', 2a', and 3a'. NMR spectroscopic and MS data confirm the composition of the compounds. The [2 + 2] cyclization of the dibromo derivatives yields, in the case of 2a', the macrocycle 4b, as confirmed by HR-MS data. ((C) Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002).
引用
收藏
页码:2942 / 2946
页数:5
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