Process for the preparation of 3-spiro′cyclohexan-1,3′-′3H!indolin-2′-one! derivatives
View Patent ↗The invention relates to a process for the preparation of a compound of the formula (I) by reacting a compound of the formula (II) with a compound of the formula (III) characterized by dissolving the compounds of the formula (II) and formula (III) in a water-inmiscible organic solvent in the presence of a phase transfer catalyst, reacting with a.) an aqeuos solution of a base, or b.) a base in solid form directly and if desired transforming the compound of formula (I) thus obtained into its salt.
1. A process for preparing a compound of formula (I)
comprising dissolving a compound of formula (II)
and a compound of formula (III)
in a water immiscible organic solvent in the presence of a phase transfer catalyst, and then reacting with an aqueous solution of a base, or a base in solid form directly.
2. A process preparing a compound of formula (I)
comprising dissolving a compound of formula (II)
and a compound of formula (III)
in a water immiscible organic solvent in the presence of a phase transfer catalyst, and then reacting with an aqueous solution of a base.
3. The process according to claim 1 wherein the organic solvent is halogenated carbohydrates.
4. The process according to claim 2 wherein the organic solvent is halogenated carbohydrates.
5. The process according to claim 1 wherein the phase transfer catalyst is a quatemary nitrogen atom containing phase transfer catalyst.
6. The process according to claim 2 wherein the phase transfer catalyst is a quaternary nitrogen atom containing phase transfer catalyst.
7. The process according to claim 1 wherein the base is sodium hydroxide or potassium hydroxide.
8. The process according to claim 2 wherein the aqueous solution of a base is an aqueous sodium hydroxide solution or aqueous potassium hydroxide solution.
9. The process according to claim 1 wherein the reaction is carried out at a temperature from 5° C. to 40° C.
10. The process according to claim 2 wherein the reaction is carried out at a temperature from 10° C. to 40° C.
11. The process according to claim 1 wherein the reaction is carried out by mixing at a speed of rotation of 100-800 r.p.m.
12. The process according to claim 2 wherein the reaction is carried out by mixing at a speed of rotation of 200-800 r.p.m.
13. The process according to claims 3 wherein the organic solvent is methylene chloride, ethylene chloride, trichloroethylene or chloroform.
14. The process according to claim 4 wherein the organic solvent is methylene chloride, cthylene chloride, trichloroethylene or chloroform.
15. The process according to claim 5 wherein the phase transfer catalyst is benzyl triethyl ammonium chloride, tetrabutyl ammonium hydrogen sulfate, cetyl pyridinium bromide, tetramethyl ammonium chloride, or tetramethyl ammonium fluoride.
16. The process according to claim 6 wherein the phase transfer catalyst is benzyl triethyl ammonium chloride, tetrabutyl ammonium hydrogen sulfate, cetyl pyridinium bromide, tetramethyl ammonium chloride, or tetramethyl ammonium fluoride.
17. The process according to claims 10 wherein the reaction is carried out at a temperature from 20° C. to 30° C.
18. The process according to claims 12 wherein the reaction is carried out at a speed of rotation of 300 r.p.m.