反应详情

2 g of KOH were dissolved in 30 ml of methanol whilst being heated. The solution was cooled down to room temperature, after which 3.3 g of p-ethoxybenzylcyanide and 4 g of p-hexyloxybenzaldehyde were added. The mixture was stirred and subsequently stored at room temperature for 1 hour and then at -25° C for 2 hours. The crystallisate was filtered off and subsequently recrystallized from methanol and petroleum ether (60-80). Melting point 53.5°-54° C. Transition point nematic-isotropic 80° C. In a similar way the following compounds were obtained:

1. temperaturewhilst being heated
2. waitat -25° C for 2 hours
3. filtrationThe crystallisate was filtered off
4. customsubsequently recrystallized from methanol and petroleum ether (60-80)
5. customTransition point nematic-isotropic 80° C
6. customIn a similar way the following compounds were obtained