Acetal and ketal deprotection using Montmorillonite K10: The first synthesis of syn-4,8-dioxatricyclo[5.1.0.03,5]-2,6-octanedione

Article abstract of DOI:10.1016/S0040-4039(97)00226-8

Montmorillonite K10 in dichloromethane at room temperature conveniently and efficiently converts acetals and ketals into the corresponding carbonyl compounds. The title dione (diepoxy-1,4- cyclohexanedione) has been prepared for the brat lime using this procedure.