Triethylamine → 4-Oxazolecarboxylic acid, 5-(4-chlorophenyl)-, methyl ester
반응식
[Cl:1][C:2]1[CH:10]=[CH:9][C:5]([C:6](Cl)=[O:7])=[CH:4][CH:3]=1.[N:11]([CH2:14][C:15]([O:17][CH3:18])=[O:16])=[C:12]=O.C(N(CC)CC)C>C1COCC1>[Cl:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]2[O:7][CH:12]=[N:11][C:14]=2[C:15]([O:17][CH3:18])=[O:16])=[CH:4][CH:3]=1참가 물질
5
실험 절차
1.40 g (8.00 mmol) of 4-chlorobenzoyl chloride, 1.00 g (10.09 mmol) of methyl isocyanatoacetate and 5.9 ml (42.39 mmol) of triethylamine are dissolved in 15 ml of dry THF and stirred at RT for 48 h. The solvent is then removed on a rotary evaporator. The residue is taken up in 20 ml of ethyl acetate and washed once with 5 ml of water. The organic phase is dried over magnesium sulfate and the solvent is removed on a rotary evaporator. The residue is suspended in 10 ml of cyclohexane and filtered off. It is then recrystallized from about 10 ml of methanol. This gives needle-shaped crystals which are dried in a drying cabinet at 50° C. A further product fraction is obtained by reprecipitation after recrystallization.