Imino Diels–Alder adducts. II. Two pyrano[3,2‐c]quinolines

8‐Chloro‐9‐fluoro‐5‐phen­yl‐3,4,4a,5,6,10b‐hexa­hydro‐2H‐pyrano3,2‐c]quinoline and 10‐chloro‐9‐fluoro‐5‐phen­yl‐3,4,4a,5,6,10b‐hexa­hydro‐2H‐pyrano­3,2‐c]quinoline, both C₁₈H₁₇ClFNO, are diastereo­isomers, formed as the result of the imino Diels–Alder reactions of N‐benzyl­ideneanilines with 3,4‐dihydro‐2H‐pyran. The crystal structures reveal the stereochemistry of the pyran ring, which is endo/exo to the quinoline ring system formed in the cyclo­addition step. In both structures, the pyran ring adopts a chair conformation, while the nitrogen‐containing heterocyclic ring prefers a half‐chair conformation. The structures differ essentially in the relative orientation of the ring junction H atoms.