Water → 2-Aminomethyl-4-(1,1-dimethylpropyl)phenol hydrochloride

A mixture of 4-(1,1-dimethylpropyl)phenol (32.8 g., 0.2 mole) and 2-chloro-N-(hydroxymethyl)acetamide (24.6 g., 0.2 mole) in acetic acid (200 ml.) and 96% sulfuric acid (20 ml.) is stirred at 20° for 12 hours and then poured into cold water (1 l.). The solid that separates is extracted with ether and the ether extract is washed with water and salt brine and evaporated to dryness. The oily residue is dissolved in a mixture of 12N hydrochloric acid (100 ml.) and ethanol (100 ml.). The mixture is refluxed for 7 hours. The mixture then is evaporated to dryness under reduced pressure. The residue is triturated with dry ether to obtain a sticky white solid that is dissolved in hot ethanol (50 ml.) and precipitated in the cold by addition of ether (800 ml.). The solid is then crystallized from ethanol - 12N hydrochloric acid (1:10) to obtain 2-aminomethyl-4-(1,1-dimethylpropyl)phenol hydrochloride (17 g.), m.p. 191°-192° C.

1. extractionThe solid that separates is extracted with ether
2. extractionthe ether extract
3. washis washed with water and salt brine
4. customevaporated to dryness
5. dissolutionThe oily residue is dissolved in a mixture of 12N hydrochloric acid (100 ml.) and ethanol (100 ml.)
6. temperatureThe mixture is refluxed for 7 hours
7. customThe mixture then is evaporated to dryness under reduced pressure
8. customThe residue is triturated with dry ether
9. customto obtain a sticky white solid
10. customprecipitated in the
11. additioncold by addition of ether (800 ml.)
12. customThe solid is then crystallized from ethanol - 12N hydrochloric acid (1:10)

ORD-Eintrag

ord-58f4e069bd2b448db2e5a3b73255a3ee

Quelldatensatz

uspto-grants-1977_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04029816