Rhodium (Chief Bee)
11-10-01 08:56
No 235120
      Potassium Phtalimide  Bookmark   

Does anyone have a good lab prep procedure for potassium phtalimide handy (from phtalimide and KOH)?
(Hive Bee)
11-10-01 15:43
No 235185
      Re: Potassium Phtalimide  Bookmark   

Ive never heard of this compound before? An alkalai imide?

Are you referring to a C6H4(CO)2NK species?

I mean literally the potassium bonded to the nitrogen in place of the hydrogen of the imide? I didn't know such a species could exist.


Vivent Longtemps la Ruche! STRIKE For President!
(Old P2P Cook)
11-10-01 16:51
No 235196
      Re: Potassium Phtalimide  Bookmark   

Or does he want to hydrolyze it, getting rid of the nitrogen and producing the potassium salt of the corresponding lactone (phthalide). There is a procedure in Vogel for this (sodium salt not potassium). He does not isolate the salt though, instead it is immediately treated with HCl to form the lactone.
(Hive Bee)
11-10-01 17:44
No 235207
      Re: Potassium Phtalimide  Bookmark   

Vogel's 3rd Ed states that if the alternative Gabriel synthesis using phthalimide and potassium carbonate isn't feasible, than one may prepare potassium phthalimide from a solution of phthalimide in absolute ethanol and potassium hydroxide in 75% ethanol smile