反应详情

1.59 g (5 mmol) of 2,5-bis-benzyloxybenzaldehyde, 0.73 g (5.5 mmol) of rhodanine, 0.29 g (2 mmol) of piperidine acetate and 40 ml of toluene were heated on a water separator under a nitrogen atmosphere for 1.5 hours. After cooling, the yellow crystals were filtered off under suction, washed with toluene and diethyl ether and dried in a vacuum: 1.34 g (62%) of 5-[(2,5-bis-benzyloxyphenyl)methylene]-4-oxo-2-thioxo-thiazolidine; 1HNMR (DMSO-d6, 250 MHz) δ 13.80 (s, 1H), 7.80 (s, 1H), 6.85-7.50 (m, 13H), 5.19 (s, 2H), 5.10 (s, 2H); TLC (toluene/methyl ethyl ketone/glacial acetic acid (72:20:8)): Rf=0.80.

1. temperatureAfter cooling
2. filtrationthe yellow crystals were filtered off under suction
3. washwashed with toluene and diethyl ether
4. customdried in a vacuum