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-b04fe21988c64a61a523deef8263b822

Quelldatensatz

uspto-grants-1978_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04091224