A basic ionic liquid catalyzed reaction of benzothiazole,aldehydes, and 5,5‐dimethyl‐1,3‐cyclohexanedione: Efficient synthesis of tetrahydrobenzo[b]pyrans
Key Laboratory of Eco‐Chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China