反应详情

温度

75 °C

A mixture of 3-(4-bromobutyl)-4-thiazolidinone (4.00 g), 1-(3-isoquinolinyl)piperazine (3.53 g), K2CO3 (6.22 g), NaI (300 mg) and acetonitrile (190 mL) was heated at 75° C. (bath temperature) under N2. After 16 h, TLC analysis (silica gel, 40% EtOAc/hexane) showed the absence of starting bromide and a major product at Rf =0.22 (silica gel, 5% MeOH/CH2Cl2). The reaction mixture was cooled to ambient temperature and filtered, the inorganic solid was washed with hot ethyl acetate, and the wash was combined with the above filtrate and concentrated in vacuo to a green solid. The solid was triturated with hot ethyl acetate (300 mL) and the mixture filtered. The filtrate was concentrated in vacuo to a solid which was chromatographed (Waters Prep 500, 1 silica gel column, 5% MeOH/CH2Cl2) to yield 5.10 g of a green solid. The solid was recrystallized from methylene chloride/hexanes to give 2.99 g of light green crystals, mp 145°-146.5° C.

1. temperatureThe reaction mixture was cooled to ambient temperature
2. filtrationfiltered
3. washthe inorganic solid was washed with hot ethyl acetate
4. concentrationconcentrated in vacuo to a green solid
5. customThe solid was triturated with hot ethyl acetate (300 mL)
6. filtrationthe mixture filtered
7. concentrationThe filtrate was concentrated in vacuo to a solid which
8. customwas chromatographed (Waters Prep 500, 1 silica gel column, 5% MeOH/CH2Cl2)