AbstractThe facile synthesis of stereo‐defined and transformable functionality‐enriched building blocks is of great importance in modern organic chemistry, as it allows the rapid and divergent assembly of complex molecules. Herein a halogen electrophile (N‐bromosuccinimide and N‐iodosuccinimide) initiated semipinacol rearrangement reaction of B(MIDA)‐propargylic alcohols (MIDA=N‐methyliminodiacetyl) by aryl migration towards the synthesis of amphoteric α‐haloalkenyl boronates in moderate to good yields with excellent stereoselectivities is reported. The value of the products is evidenced by their ability to undergo divergent conversions to polysubstituted alkenes through manipulation of the C−B and C−X (X=Br, I) bonds and the carbonyl group.
摘要 易于合成立体定义和可转化的功能丰富的构筑基块在现代有机化学中具有重要意义,因为它允许复杂分子的快速和发散组装。本文报道了卤素亲电子体(N-溴代琥珀酰亚胺和 N-碘代琥珀酰亚胺)通过芳基迁移引发的 B(MIDA)-丙炔醇(MIDA=N-甲基亚氨基二乙酰基)的半联烷醇重排反应,以中等至良好的产率和优异的立体选择性合成两性α-卤代烯基硼酸酯。通过操作 C-B 和 C-X(X=Br,I)键以及羰基,这些产物能够发生向多取代烯烃的不同转化,这证明了它们的价值。