My 3-4 CMC synthesis situation and failures

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I still can't succeed in making 3-4 CMC, guys. I have tried increasing and decreasing the temperature and time. Today I will stir continuously for 8 hours. Keeping the temperature between 30 and 32 degrees Celsius. Please help me.

 

[A5kL3Pi0s]

DCM or Ethyl Acetate?

 

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Last time we tried 4CMC with DCM.