Triethylamine → N-(8-Methoxychroman-2-yl-methyl)-cyclohexanecarboxamide

Reaction equation

[NH2:1][CH2:2][CH:3]1[CH2:12][CH2:11][C:10]2[C:5](=[C:6]([O:13][CH3:14])[CH:7]=[CH:8][CH:9]=2)[O:4]1.C(N(CC)CC)C.[CH:22]1([C:28](Cl)=[O:29])[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]1>C(Cl)Cl>[CH3:14][O:13][C:6]1[CH:7]=[CH:8][CH:9]=[C:10]2[C:5]=1[O:4][CH:3]([CH2:2][NH:1][C:28]([CH:22]1[CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]1)=[O:29])[CH2:12][CH2:11]2

Participants

Procedure

A mixture of 9.5 g (49 mmol) of 2-aminomethyl-8-methoxychroman and 4.9 ml (49 mmol) of triethylamine in 50 ml of anhydrous methylene chloride is added dropwise to a solution of 7.2 g (49 mmol) of cyclohexanecarbonyl chloride in 75 ml of anhydrous methylene chloride, while stirring and cooling with ice. After the mixture has been left to stand overnight, it is poured onto ice. Separation of the phases, extraction of the aqueous phase with methylene chloride, washing with saturated sodium chloride solution and drying of the combined organic phases over anhydrous sodium sulphate gives, after evaporation under a water pump vacuum, 14.5 g of crude amide, which is recrystallised from 160 ml of ethyl acetate. IR (KBr): 3307, 2931, 1642, 1485 and 1256 cm