A simple, regioselective synthesis of 2,3,5-trisubstituted furans is described. Conjugate addition of alkynylboronates to α,β-unsaturated ketones, followed by acid-catalyzed cyclization of the resulting γ-alkynyl ketones affords trisubstituted furans in 31–97% overall yields.
描述了2,3,5-三取代的
呋喃的简单的区域选择性合成。将炔基
硼酸酯加成到α,β-不饱和酮上,然后酸催化环化所得的γ-炔基酮,可得到三取代
呋喃,总产率为31-97%。