Three-Component 1,2-Dioxygenation of 1,3-Dienes Using Carboxylic Acids and TEMPO.

A mild, metal-free 1,2-dioxygenation of 1,3-dienes using TEMPO and carboxylic acids is reported. This method includes examples for a variety of 1,3-dienes as well as aliphatic and aromatic carboxylic acids. This reaction also demonstrates complete site- and regioselectivity in the oxygen addition.