and nickel catalysts, furnishing five-membered cyclic boryl ethers regioselectively in good yields via 5-exo cyclization. The products were transformed into highly substituted α,β-unsaturated nitriles via Suzuki–Miyaura coupling to aryl iodides, rhodium-catalyzed conjugative addition to methyl vinyl ketone, and rhodium-catalyzed protodeborylation.
在
钯和
镍催化剂的存在下,高炔
丙醇的
氰基(二烷基
氨基)
硼醚在其碳-碳三键上进行B-CN键的分子内加成(
氰基化),通过5选择性地高产率提供五元环状
硼醚-exo环化。产物通过Suzuki-Miyaura与芳基
碘化物的偶联,
铑催化的对甲基
乙烯基酮的共轭加成以及
铑催化的原基脱
硼化作用,转变为高度取代的α,β-不饱和腈。