“…After filtration, 0.2 g of yellow 2-(3,4-dihydro-l-isoquinolyl)-5-phenylpyrrole (XIV), mp 113-114°, was obtained, as identified by its infrared spectrum. 5. Dehydrogenation of 2-(3,4-Dihydro-l-isoquinolyl)-5-phenylpyrrole (XIV).-A mixture of 0.3 g of 2-(3,4-dihydro-1 -isoquinolyl)-5-phenylpyrrole and 0.05 g of 10% palladium-on-charcoal catalyst was heated at 180-200°under a slow stream of nitrogen for 45 min.…”