作者:Nasima Yasmin、Jayanta K. Ray
DOI:10.1039/c3ra45117h
日期:——
A number of (E)-3-alkylidine-phthalide derivatives have been prepared at room temperature in excellent yields in a one-pot reaction by treating o-alkenylbenzoic acids with meta-chloroperbenzoic acid and para-toluenesulfonic acid. This reaction presumably occurs via domino epoxidation – intramolecular cyclization – acid catalyzed dehydration sequence of reactions. On the other hand, 3-(2-formyl-3,4-dihydro-naphthalen-1-yl)-acrylic acid esters and 3-(2-formyl-3,4-dihydro-naphthalen-1-yl)-acrylonitriles afforded phthalide derivatives under Pinnick reaction conditions involving oxidation-intramolecular Michael addition.
通过用间氯过苯甲酸和对甲苯磺酸处理邻链烯基苯甲酸,在室温下以优异的产率在一锅反应中制备了许多(E)-3-亚烷基苯酞衍生物。该反应可能是通过多米诺骨牌环氧化-分子内环化-酸催化脱水反应序列发生的。另一方面,3-(2-甲酰基-3,4-二氢萘-1-基)-丙烯酸酯和3-(2-甲酰基-3,4-二氢-萘-1-基)-丙烯腈在涉及氧化-分子内迈克尔加成的 Pinnick 反应条件下提供了苯并呋喃衍生物。