An Organocatalyzed Expeditious Synthetic Route to Tetrahydrobenzo[a]xanthen-11-ones via Grinding Technique

In the present study, successful implementation of grinding technique and camphor sulphonic acid (CSA) as a catalyst, has been demonstrated for the rapid synthesis of 12-aryl-9,9-dimethyl-8,9,10,12-tetrahydrobenzo[a]xanthen-11- ones at ambient temperatures, avoiding excessive/wasteful heating.