2-(2-Methoxyethyl)-2-imidazoline hydrochloride → 2-(2-Methoxyethyl)-4,5-dihydro-1H-imidazole

100 Parts of 6N sodium hydrochloride in a suitable reaction vessel are cooled to 5° C. with an ice-water bath and 22.7 parts of the 2-(2-methoxyethyl)-2-imidazoline hydrochloride of Example 2 are added to the cold solution. An oil separates. The contents of the vessel are transferred to a separatory vessel and the aqueous phase is extracted four times with 30 parts of reagent grade tetrahydrofuran. The combined tetrahydrofuran extracts are dried over anhydrous potassium carbonate for 15 hours. The potassium carbonate is then filtered off and the tetrahydrofuran solution is distilled to yield 14.0 parts of 2-(2-methoxyethyl)-2-imidazoline.

1. customThe contents of the vessel are transferred to a separatory vessel
2. extractionthe aqueous phase is extracted four times with 30 parts of reagent grade tetrahydrofuran
3. dry with materialThe combined tetrahydrofuran extracts are dried over anhydrous potassium carbonate for 15 hours
4. filtrationThe potassium carbonate is then filtered off
5. distillationthe tetrahydrofuran solution is distilled

ORD-Eintrag

ord-b9fb06cf9a9a4bab8f50eff9c3173103

Quelldatensatz

uspto-grants-1977_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04007200