Ethanolamine → HCID 178438962, Verbindung

To a solution of (2-isopropylphenyl)isothiocyanate (2.00 g) in diethylether (20 ml) was added 2-aminoethanol (0.69 g). The mixture was stirred at room temperature for 1 hour and concentrated under reduced pressure. To the obtained oil was added concentrated hydrochloric acid (5 ml). The mixture was refluxed for 3 hours. The reaction mixture was cooled to room temperature and poured into an aqueous solution of 20% sodium hydroxide (25 ml). The mixture was extracted with dichloromethane (60 ml), dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate) to give 2-(2-isopropylphenyl)imino-1,3-thiazolidine (1.80 g, yield: 73%) as a white crystal. M.p. 76-77° C.

1. concentrationconcentrated under reduced pressure
2. additionTo the obtained oil was added concentrated hydrochloric acid (5 ml)
3. temperatureThe mixture was refluxed for 3 hours
4. temperatureThe reaction mixture was cooled to room temperature
5. additionpoured into an aqueous solution of 20% sodium hydroxide (25 ml)
6. extractionThe mixture was extracted with dichloromethane (60 ml)
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate)

ORD-Eintrag

ord-2e45031aa7cd4213b8b070b9f2e4cf66

Quelldatensatz

uspto-grants-2008_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07420053B2