中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 7-methyl-4-oxo-4H-1-benzopyran-3-carboxylic acid | 71345-99-8 | C11H8O4 | 204.182 |
—— | β-(7-Methyl-3-chromonyl)acrolein | 124980-72-9 | C13H10O3 | 214.221 |
—— | (2E)-3-(7-methyl-4-oxo-4H-chromen-3-yl)prop-2-enoic acid | 1263273-38-6 | C13H10O4 | 230.22 |
—— | 3-(7-Methyl-4-oxochromen-3-yl)prop-2-enoic acid | 382636-47-7 | C13H10O4 | 230.22 |
—— | 2-[(7-Methyl-4-oxochromen-3-yl)methylidene]indene-1,3-dione | —— | C20H12O4 | 316.3 |
A green, mild and efficient method for Knoevenagel condensation of 3-formylchromone/2-chlroquinoline-3-carbaldehyde with active methylene compounds such as Meldrum’s acid/ethyl cyanoacetate using biosupported cellulose sulphuric acid (CSA) in the solid-state by grinding under solvent-free condition has been developed. This method provides several advantages including environmental friendliness, shor t reaction times, high yields and a simple work-up procedure. Moreover, the CSA was successfully reused for four cycles without significant loss of activity.