作者:Laura Hoffmeister、Peter Persich、Alois Fürstner
DOI:10.1002/chem.201304580
日期:2014.4.7
In an attempt to study the ability of the latest generation of alkyne metathesis catalysts to process sterically hindered substrates, two different routes to the bacterial metabolite kendomycin (1) were explored. Whereas the cyclization of the overcrowded arylalkyne 39 and related substrates turned out to be impractical or even impossible, ring closure of the slightly relaxed diyne 45 was achieved
为了研究最新一代的炔烃复分解催化剂处理空间受阻底物的能力,探索了两种不同的途径通往细菌代谢物Kendomycin(1)。事实证明,过度拥挤的芳基炔烃39和相关底物的环化是不切实际甚至是不可能的,借助于赋予三苯甲硅烷醇酸酯配体的烷基亚炔基钼2,在显着温和的条件下,以极好的收率实现了稍微松弛的二炔45的闭环。生成的环炔烃46参与金催化的加氢烷氧基化反应,生成苯并呋喃47以前已经作为到达1的后期中间路线。