反应详情

To a stirred solution of 99.5% methanesulphonic acid [Aldrich] (422 g; 4.40 mol) in methanol (720 cm3) at 40° was added portionwise over 30 minutes aminoguanidine bicarbonate [Aldrich] (272.0 g; 2.00 mol). When the addition was complete, the solution was stirred until the temperature had fallen to ˜40° and then treated slowly with cold ether (500 cm3). During the addition, colourless needles started to deposit. The resulting slurry was stood at 0° for 4 hrs, filtered and the product washed with cold ether and dried overnight in vacuo at 50°. Yield=528 g (99.25%), mpt=149-150°

1. additionWhen the addition
2. customhad fallen to ˜40°
3. additionDuring the addition, colourless needles
4. filtrationfiltered
5. washthe product washed with cold ether
6. customdried overnight in vacuo at 50°