Bischler-Napieralski · Amide → Dihydroisoquinoline
unseel.com · POCl₃ cyclodehydration · 1893
C1 species amide C=O
Ring closed no
Stage N-acyl-β-arylethylamine
Electron-rich arene
Nitrogen
Carbonyl O / leaving O
Acyl carbon (C1)
New C-C bond
Unseel.com · Bischler-Napieralski