Morita–Baylis–Hillman acetates undergo smooth allylic nucleophilic substitution (SN2′) with tosylmethyl isocyanide (TosMIC) in the presence of a catalytic amount of BF3·OEt2 under mild conditions to furnish trisubstituted olefins in high yields with (E)-stereoselectivity.
在催化量的BF 3 ·OEt 2的存在下,Morita–Baylis–Hillman乙酸酯经过甲苯磺酰基甲基异氰化物(TosMIC)的顺式烯丙基亲核取代(S N 2')在温和的条件下以(E)高产率提供三取代烯烃-立体选择性。