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Thread: Synthesis of coumarin

  1. #1 Synthesis of coumarin 
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    Oct 2013
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    hello everyone
    i have to synthsis a coumarine by the adding 0,05 mol of salicylaldehyde , 0,05 mol of malonate and 100 ml of toluene. then we add 0,5 ml of piperidine and 0,1 ml of acetic acid. we put this in the Dean-Stark so we will have water and alcohol and ethyl 2-oxo-2H-chromene-3-carboxylate.
    i tried to do the reaction
    so this is what i did


    so for step 4 and 5, i don't know if it's good or not,, and what the tuloene and acetic acid do in the reaction?
    help me please


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  3. #2  
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    Toluene is the solvent and acetic acid probably helps in protonation steps.


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