Phenylhydrazine → Indole

Participants

Reaction Steps

A 0.25 mol/L 1,3-cyclohexanedione/50% sulfuric acid solution was sent as a first fluid from the center at a ratio of supply pressure/back pressure of 0.07 MPa/0.02 MPa, a rotation speed of 500 rpm, and a sending temperature of 25° C., and a 0.25 mol/L phenylhydrazine/50% sulfuric acid solution was introduced as a second fluid into a space between the processing surfaces at 18 mL/min. The first fluid and the second fluid were mixed in a thin film fluid, and then a solution obtained after processing was discharged from the space between the processing surfaces at 29 mL/min. As a result of HPLC analysis, the production rate of 1,2,3,4-tetrahydrocarbazol-4-one was 80% or higher.

Provenance & Evidence