Synthesen von Carotinen mit ψ‐Endgruppen und ( Z )‐Konfiguration an terminalen konjugierten Doppelbindungen

Syntheses of Carotenes with ψ‐End Groups and ( Z )‐Configuration at Terminal Conjugated Double Bonds Five carotenes bearing (5 Z )‐ψ‐end groups were synthesized and carefully characterized: (5 Z )‐lycopene ( 6 ), (5 Z 5′ Z )‐lycopene ( 7 ), (5′ Z )‐neurosporene ( 8 ), (5′ Z )‐β,ψ‐carotene ( 12 ), and (5′ Z )‐ε,ψ‐carotene ( 14 ).