Sodium Iodide → Benzyl 4-(pyrimidin-4-yl-methyl)piperazine-1-carboxylate

Temperature

150 °C

To a stirred solution of 0.20 g (1.8 mmol) of 1-(pyrimidin-4-yl)methanamine and 0.61 g (2.2 mmol) benzyl bis(2-chloroethyl)carbamate in 4 mL anhydrous diethylene glycol dimethyl ether was added 3.20 mL (18.3 mmol) of N,N-diisopropylethylamine and 0.05 g (0.40 mmol) of sodium iodide. The resulting solution was heated to 150° C. for 6 h. After cooling to ambient temperature, 12 mL of methanol was added to the mixture followed by 250 mL of diethyl ether. The resulting white precipitate was isolated by vacuum filtration while washing with diethyl ether. Diluted the solid with 100 mL of saturated sodium bicarbonate and extracted the aqueous solution with ethyl acetate (3×100 mL). The combined organic layers were dried with magnesium sulfate, filtered, and concentrated in vacuo to afford the title compound as a white solid which was used without further purification. LC/MS: m/z (ES) 313.1 (MH)+.

1. temperatureAfter cooling to ambient temperature
2. customThe resulting white precipitate was isolated by vacuum filtration
3. washwhile washing with diethyl ether
4. additionDiluted the solid with 100 mL of saturated sodium bicarbonate
5. extractionextracted the aqueous solution with ethyl acetate (3×100 mL)
6. dry with materialThe combined organic layers were dried with magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo

ORD record

ord-4edd9be00ff041d19ba558728d4aa539

Source dataset

uspto-grants-2015_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08933102B2