反应详情

3-methylthiophene-2-aldehyde (103 g, 0.816 mol) was mixed with hexane (100 ml), to which aniline (74.4 ml, 0.816 mol) was added and stirred at room temperature for 7 hours. After separating deposited crystalline solids by filtration, and washing with hexane, 139.5 g (yield: 85%) of 3-methylthiophene-2-aldehyde phenylimine was obtained. After concentrating the liquid filtrate and stirring at room temperature for a further 12 hours, 7.30 g (yield: 4%) of 3-methylthiophene-2-aldehyde phenylimine was obtained by post treatment in the same manner as above. 1H-NMR spectra (chemical shift, ppm: in CDCl3); 2.47 (3H, s), 6.92 (1H, d, J=4.9 Hz), 7.15-7.30 (3H), 7.30-7.45 (3H), 8.61 (1H).

1. additionwas added
2. customAfter separating
3. filtrationby filtration
4. washwashing with hexane