Author Topic: acetaldehyde phenylhydrazone  (Read 4547 times)

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acetaldehyde phenylhydrazone
« on: August 13, 2000, 07:41:00 AM »
According to a number of chemistry books acetaldehyde phenylhydrazone can't be converted into indole by the Fisher method.  I found this patent that converts this starting material into indole using a high temperature catalytic process (aluminium oxide at 320-330 degrees C).  The patent number is 3,790,596.