[3+2] Cycloaddition of Masked o-Benzoquinones with Azomethine Ylides

A simple and efficient access to highly functionalized isoindolone derivatives via a [3+2] cycloaddition process between in situ generated azomethine ylides with various stable (isolable) masked o-benzoquinones is described. This approach allows a rapid and general synthesis of isoindolones with substituents to further manipulate and elaborate the structural complexity.