反应详情

温度

20 °C

N-[(5-tert-Butyl-2-isobutyl-3-oxo-2,3-dihydro-1H-isoindol-1-yl)acetyl]guanidine is prepared as described in Example 9, starting with 10 cm3 of absolute ethanol, 0.19 g of sodium, 0.80 g of guanidinium chloride and 1.81 g of ethyl (5-tert-butyl-2-isobutyl-3-oxo-2,3-dihydro-1H-isoindol-1-yl)acetate in 10 cm3 of absolute ethanol. The reaction mixture is stirred at a temperature in the region of 20° C. for 18 hours and is then concentrated to dryness under reduced pressure (2 kPa) at a temperature in the region of 40° C. The residue is taken up in a mixture of 10 cm3 of water and 30 cm3 of diethyl ether and then stirred at a temperature in the region of 0° C. for 1 hour. The precipitate obtained is filtered off, washed with twice 10 cm3 of ice-cold water and then dried in a desiccator under reduced pressure (2 kPa) at a temperature in the region of 20° C. 1.1 g of N-[(5-tert-butyl-2-isobutyl-3-oxo-2,3-dihydro-1H-isoindol-1-yl)acetyl]guanidine are thus obtained in the form of a white powder melting at 262-263° C. Ethyl (5-tert-butyl-2-isobutyl-3-oxo-2,3-dihydro-1H-isoindol-1-yl)acetate is described in Example 10. (Analysis: C19 H28 N4 O2; % calculated C, 66.25; H, 8.19; N, 16.27; O, 9.29%. found C, 66.13; H, 8.50; N, 16.12).

1. customN-[(5-tert-Butyl-2-isobutyl-3-oxo-2,3-dihydro-1H-isoindol-1-yl)acetyl]guanidine is prepared
2. concentrationis then concentrated to dryness under reduced pressure (2 kPa) at a temperature in the region of 40° C
3. additionThe residue is taken up in a mixture of 10 cm3 of water and 30 cm3 of diethyl ether
4. stirringstirred at a temperature in the region of 0° C. for 1 hour
5. customThe precipitate obtained
6. filtrationis filtered off
7. washwashed with twice 10 cm3 of ice-cold water
8. customdried in a desiccator under reduced pressure (2 kPa) at a temperature in the region of 20° C