H-ZSM-5, sealed tube, 200 °C, 5 h or aq HCl–light petroleum reflux ... Cyclization of 2,6-Diones over H-ZSM-5: One-pot Synthesis of Dimethylphenols and Substituted , -Unsaturated Cyclohexenones† ... P. Veera Reddy, Adekkanattu M. Prakash, Dipak K. Chakrabarty and Sujata V. Bhat* Department of Chemistry, Indian Institute of Technology, Bombay-400 076, India ... 2,6-Diones on treatment with zeolite H-ZSM-5 yield dimethylphenols (DMPs) or , - ...