Abstract
A very short, high‐yielding, one‐pot procedure has been developed for the preparation of half‐protected cyclobutane‐1,2‐dione. This compound is much more stable than cyclobutane‐1,2‐dione itself and allowed further transformation to give diprotected cyclobutanetrione equivalents.
Acknowledgments
The authors thank the Ministe`re de I'Education Nationale, Enseignement Supe´rieur et Recherche (MENESR) for a grant to G. Deguest.