Abstract |
The catalytic dehydrogenation of 5-phenyl-3,4-dihydro-2H-pyrrole (2-phenyl-1-pyrroline) to 2-phenyl-1H-pyrrole in the presence of palladium-supported on activated carbon (Pd/C) or on alumina (Pd/Al2O3) is reported. Highly pure 2-phenylpyrrole is obtained in good yields and selectivities, in a ca. 20 gram-scale, after a simple work-up. The Pd/Al2O3 catalyst exhibited substantially higher activities than the Pd/C ones. |