化学
配体(生物化学)
部分
立体化学
二烯
复分解
硼氢化
亚胺离子
钯
烯胺
催化作用
组合化学
有机化学
聚合
聚合物
天然橡胶
受体
生物化学
作者
Senmiao Xu,Fredrik Hæffner,Bo Li,Lev N. Zakharov,Shih‐Yuan Liu
标识
DOI:10.1002/anie.201403903
摘要
Abstract We report the first general synthesis of boron‐substituted monobenzofused 1,4‐azaborines using ring‐closing metathesis of an enamine‐containing diene as a key synthetic strategy. As part of our investigations, we discovered that the B‐C3 moiety in a 1,4‐azaborine can serve uniquely as a η 2 ‐L‐type ligand. This functionality is exemplified by two κ 2 ‐ N ‐η 2 ‐BC Pt complexes of a boron‐pyridyl‐substituted monobenzofused‐1,4‐azaborine. Single‐crystal X‐ray diffraction analysis of the Pt complexes shows a strong structural contribution from the iminium resonance form of the monobenzofused‐1,4‐azaborine ligand. We also demonstrate that a palladium(0) complex supported by a 1,4‐azaborine‐based phosphine ligand can catalyze hydroboration of 1‐buten‐3‐yne with unique selectivity. In view of the importance of arene–metal π‐interactions in catalytic applications, this work should open new opportunities for ligand design involving the 1,4‐azaborine motif as an arene substitute.
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