In the presence of a rhodium catalyst, unactivated Baylis–Hillman adducts reacted regioselectively with potassium trifluoro(organo)borates to afford stereodefined trisubstituted alkenes with good yields. This highly efficient reaction (aerobic conditions, low temperature, absence of added phosphane ligand) is believed to proceed via a 1,4-addition/β-hydroxy elimination mechanism.
在
铑催化剂的存在下,未活化的Baylis-Hillman加合物与三
氟(有机)
硼酸钾区域选择性地反应,从而以良好的收率得到立体确定的三取代的烯烃。该高效反应(有氧条件,低温,不存在添加的
膦配体)被认为是通过1,4-加成/β-羟基消除机理进行的。