Studies on the Chemical Constituents of Rutaceous Plants. Part LXIX. Cesium Fluoride-Mediated Claisen Rearrangement of Aryl Propargyl Ether. Exclusive Formation of 2-Methylarylfuran and Its Availability as a Masked Salicylaldehyde.
作者:Hisashi ISHII、Tsutomu ISHIKAWA、Sunao TAKEDA、Satoshi UEKI、Masahiro SUZUKI
DOI:10.1248/cpb.40.1148
日期:——
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。