Synthesis of acyl fluorides <i>via</i> photocatalytic fluorination of aldehydic C–H bonds
作者:Michael Meanwell、Johannes Lehmann、Marc Eichenberger、Rainer E. Martin、Robert Britton
DOI:10.1039/c8cc06375c
日期:——
demonstrate that acyl fluorides can be prepared directly from aldehydes via a C(sp2)–H fluorination reaction involving the inexpensive photocatalyst sodium decatungstate and electrophilic fluorinating agent N-fluorobenzenesulfonimide. This convenient fluorination strategy enables direct conversion of aliphatic and aromatic aldehydes into acylating agents.
酰氟由于其独特的稳定性而成为通用的酰化剂。然而,它们的合成可能带来挑战,并且通常通过羧酸的脱氧氟化来完成。在这里,我们证明了酰氯可以直接由醛类通过C(sp 2)-H氟化反应制备,该反应涉及廉价的光催化剂脱卡酸钠和亲电氟化剂N-氟苯磺酰亚胺。这种方便的氟化策略可将脂族和芳族醛直接转化为酰化剂。