In control: A highly selective carbocyclization/borylation of allenynes with bis(pinacolato)diboron (B2pin2) under palladium catalysis and with p‐benzoquinone (BQ) as the oxidant was developed. The use of either LiOAc⋅2 H2O with 1,2‐dichloroethane (DCE) as the solvent or BF3⋅Et2O together with THF is crucial for the selective formation of borylated trienes and vinylallenes, respectively.
对照:在钯催化下,以对苯醌 (BQ) 作为氧化剂,开发了双(频那醇)二硼 (B 2 pin 2 ) 的丙烯炔高度选择性碳环化/硼化反应。使用 LiOAc⋅2 H 2 O 和 1,2-二氯乙烷 (DCE) 作为溶剂或 BF 3 ⋅Et 2 O 和 THF 分别对于选择性形成硼基化三烯和乙烯基丙二烯至关重要。