Supported by the Zhejiang Provincial Natural Science Foundation of China(LY15B060002);the National Natural Science Foundation of China(21106090,21272169,21471110);the National Undergraduate Programs for Innovation and Entrepreneurship(201410350018)
A simple and ef ficient method is proposed for the synthesis of tetrahydrobenzo[b]pyrans with aromatic aldehydes, active methylene compounds, and dimedone using basic ionic liquid catalyst in water. The procedure offe...