The Vespiary

The Hive => Chemistry Discourse => Topic started by: Rhodium on November 10, 2001, 08:56:00 AM

Title: Potassium Phtalimide
Post by: Rhodium on November 10, 2001, 08:56:00 AM
Does anyone have a good lab prep procedure for potassium phtalimide handy (from phtalimide and KOH)?
Title: Re: Potassium Phtalimide
Post by: PrimoPyro on November 10, 2001, 03:43:00 PM
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.

                                                   PrimoPyro
Vivent Longtemps la Ruche! STRIKE For President!
Title: Re: Potassium Phtalimide
Post by: terbium on November 10, 2001, 04:51:00 PM
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.
Title: Re: Potassium Phtalimide
Post by: lugh on November 10, 2001, 05:44:00 PM
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  :)