Electrophilic Borylation of Terminal Alkenes with BBr<sub>3</sub>/2,6-Disubstituted Pyridines
作者:Shinya Tanaka、Yuki Saito、Takaya Yamamoto、Tetsutaro Hattori
DOI:10.1021/acs.orglett.8b00335
日期:2018.4.6
borylated by the combined use of BBr3/2,6-dichloropyridine (B3) or BBr3/2,6-lutidine (B5). α,α-Diarylalkenes prefer the former reagent combination, while other alkenes prefer the latter. Mechanistic considerations strongly suggest that the former and latter reactions proceed through electrophilic substitution reactions with BBr3 and [BBr2·B5]+BBr4–, respectively.
通过结合使用BBr 3 / 2,6-二氯吡啶(B3)或BBr 3 / 2,6-lutidine(B5)使各种末端烯烃以及杂芳族化合物硼化。α,α-二芳基烯烃更喜欢前一种试剂组合,而其他烯烃则更喜欢后者。机理上的考虑强烈表明,前者和后者反应分别通过与BBr 3和[BBr 2 · B5 ] + BBr 4 –的亲电取代反应进行。