Regioselective Synthesis of Substituted <i>o</i>-Alkoxyphenol Derivatives through Thermal Benzannulation of Fischer (Alkenylcyclobutenyl)carbene Complexes
作者:José Barluenga、Fernando Aznar、M. Ángel Palomero
DOI:10.1021/jo0264574
日期:2003.1.1
A convenient, regioselective, and general synthetic method for producing highly substituted o-phenol-containing polycycles from Fischer (alkenylcyclobutenyl)carbene complexes has been described. The starting complexes have been synthesized by means of the [2 + 2] cycloaddition reaction of (alkenylethynyl)carbene complexes and a range of enol ethers, and in most cases, they have proven to be stable
已经描述了从费歇尔(烯基环丁烯基)卡宾络合物生产高度取代的含邻苯酚的多环的方便,区域选择性和通用的合成方法。通过(烯基乙炔基)卡宾配合物和一系列烯醇醚的[2 + 2]环加成反应合成了起始配合物,并且在大多数情况下,已证明它们在室温下稳定,因此是可分离的。合成的关键步骤包括这些新型五羰基二烯基菲舍尔配合物的热苯环化反应,这对于这类配合物而言是前所未有的转变。(烯基环丁烯基)卡宾配合物的出乎意料的行为已经在其几何形状方面得到了合理化。