New short step general synthesis of isobenzofuran-1(3H)-ones (phthalides) based on a single or double β-scission of alkoxyl radicals generated from 1-ethyl-benzocyclobuten-1-ols and from 1,3-dihydroisobenzofuran-1-ols; synthesis of some natural phthalides
作者:Kazuhiro Kobayashi、Masahito Itoh、Akiyoshi Sasaki、Hiroshi Suginome
DOI:10.1016/s0040-4020(01)80977-7
日期:1991.7
New general methods are described for the synthesis of phthalides, 3-monosubstituted, and 3,3-disubstituted phthalides including naturally-occurring phthalides such as pierardine based on a regioselective single or double β-scission of the alkoxyl radicals generated by the photolysis of the hypoiodites of 1-ethyl benzocyclobuten-1-ols or 1,2-catacondensed benzocyclobuten-1-ols or 1,3-dihydro-1,3-a
描述了基于由苯酚的光解所产生的烷氧基的区域选择性单或双β-断裂来合成邻苯二甲酸酯,3-单取代和3,3-二取代的邻苯二甲酸酯,包括天然存在的邻苯二甲酸酯(如piardardine)的新通用方法。 1-乙基苯并环丁烯-1-醇或1,2-催化的苯并环丁烯-1-醇或1,3-二氢-1,3-链烷异苯并呋喃-1-醇的亚碘酸盐。讨论了涉及由1-烷基苯并环丁烯-1-醇和催化缩合的苯并环丁烯-1-醇生成的烷氧基的区域选择性的单或双β-分裂的邻苯二甲酸酯的形成路径。