Brønsted acidic ionic liquids promoted cyclocondensation reaction: Synthesis of 1,8-dioxo-octahydroxanthene |
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| Authors: | PP Salvi AM Mandhare AS Sartape DK Pawar SH Han SS Kolekar |
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| Institution: | aDepartment of Chemistry, Shivaji University, Kolhapur 416 004 (MS), India;bInorganic Nano-Material Laboratory, Department of Chemistry, Hanyang University, Seoul 133-791, South Korea |
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| Abstract: | A new functionalized basic ionic liquid, 4-amino-1-(2,3-dihydroxy propyl) pyridinium hydroxide ADPPY] OH], has been introduced as a catalyst for the synthesis of tetrahydrobenzob]pyrans under mild conditions. The desired products can be separated directly from the reaction mixture with high purity. Only 10 mol% catalyst was needed with a sequestration time of 10 min. In addition, the ionic liquid used can be regenerated and recycled several times without significant loss of activity. |
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| Keywords: | TSIL Regeneration of catalyst Tetrahydrobenzo[b]pyrans Multicomponent synthesis Green |
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