Claisen rearrangement of an aryl propargyl ether in the presence of CsF led to exclusive formation of 2-methylarylfuran in excellent yield. The result of a precise examination of the rearrangement is described. Satisfactory transformation of the 2-methylarylfuran to a salicylaldehyde derivative was achieved by stepwise oxidation. This combination of reactions serves as a useful method for regioselective introduction of a C1 unit at the ortho position of a phenol group.
在 CsF 的存在下,芳基
丙炔醚发生克莱森重排反应,生成了纯度极高的 2-甲基芳基
呋喃。本文介绍了对该重排反应进行精确检验的结果。通过逐步氧化,2-甲基芳基
呋喃令人满意地转化为
水杨醛衍
生物。这种反应组合是在
苯酚基团的正交位置上区域选择性引入 C1 单元的有用方法。