The hydroboration of alkynes and styrene with HBpin has been developed using tris(pentaflurophenyl)borane (B(C₆F₅)₃) as the initiator of catalysis. The hydroboration is proposed to be initiated by Lewis acid activation of the alkyne by (B(C₆F₅)₃) to form a highly reactive zwitterionic species which subsequently react with HBpin to give the alkenyl boronic ester. This zwitterion has also showed potential to be a competent catalyst for the hydroboration of styrene. The zwitterionic intermediate is analogous to that proposed in the Piers borane‐catalysed hydroboration and 1,1‐carboboration of alkynes with B(C₆F₅)_3.

中文翻译：

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两性离子引发的炔烃和苯乙烯的硼氢化

使用三（五氟苯基）硼烷（B（C ₆ F ₅）₃）作为催化引发剂，开发了炔烃和苯乙烯与HBpin的硼氢化反应。提出氢硼化是通过（B（C ₆ F ₅）₃）的路易斯酸对炔烃的路易斯酸活化作用而引发的，以形成高反应性的两性离子物质，该物质随后与HBpin反应生成烯基硼酸酯。该两性离子还显示出可能成为苯乙烯加氢硼化的有效催化剂。两性离子中间体类似于在Piers硼烷催化的硼氢化反应和B（C ₆ F ₅）₃炔烃的1,1碳硼化反应中提出的中间体_。