Sciencemadness Discussion Board

Dissolving ketone

jeremyirons - 23-3-2019 at 10:00

Hello!
I'm trying my first NaBH4 amination following instructions on rhodium and hive. All of them have a step where you add ketone to MeAm saturated MeOH under 5C temperature. But when I try to do this it doesn't dissolve and actually blocks the stirbar. I'm thinking dissolve ketone in MeOH and then add. Is that what should be done?

jeremyirons - 23-3-2019 at 10:27

After I add ketone in MeOH and start adding NaBH4 I get white precipitate in the flask that stops my stirbar so reaction stops unless I manually swirl the flask