4-(penyl-piperidin-4-ylidene-methyl)-benzamide derivatives and their use for the treatment of pain, anxiety or gastrointestinal disorders
A benzamide and methyl technology, applied in the field of new compounds, can solve problems such as inability to relieve pain, poor pharmacokinetics, and convulsions
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[0097] Example 1: 4-[1-(1-benzyl-piperidin-4-yl subunit)-1-quinolin-8-yl-methyl]-N,N- Diisopropyl-benzamide.
[0098]To a solution of amine (8) (451 mg, 1.05 mmol, 1.0 equiv) in tetrahydrofuran (20 ml) was added benzaldehyde (129 μl, 1.27 mmol, 1.2 equiv) at room temperature. After stirring for 10 minutes, sodium triacetoxyborohydride (292 mg, 1.38 mmol, 1.3 equiv) was added to the solution. After stirring overnight, the reaction mixture was diluted with dichloromethane (10ml) and 2M aqueous sodium hydroxide (15ml). The phases were separated and the organic phase was washed with brine (15ml). The previous aqueous phase was back extracted three times with dichloromethane (15ml). The combined organic phases were dried over sodium sulfate, filtered and concentrated under reduced pressure. The crude product was purified by flash chromatography eluting with 5% methanol in dichloromethane. The fractions were concentrated under reduced pressure and diluted with ether and dich...
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