The asymmetric cross-coupling reaction of [CH3CH=CHCH2BF3]K with aryl or 1-alkenyl bromides selectively occurred at the γ-carbon of 2-butenylborane moiety with regioselectivities in a range of 84–99%. The enantioselectivities were in a range of 77–90%ee when a palladium/CyPF-t-Bu complex was used at 80 °C in the presence of K2CO3 (3 equiv.) in H2O–MeOH (9/1).
[CH3CH=CHCH2BF3]K与芳基或1-烯基
溴的非对称交叉耦合反应在
2-丁烯基
硼部分的γ-碳上具有高选择性,区域选择性在84-99%之间。当使用
钯/环戊基
呋喃叔丁基配合物在80°C、存在K2CO3(3当量)的
H2O-MeOH(9/1)体系中时,对映选择性在77-90%ee之间。