tert-butyl N-{[4-(aminomethyl)phenyl]methyl}carbamate → HCID 19028292, compound

Temperature

23 °C

Lithium aluminum hydride (1.8 g, 44.5 mmol, 3.5 equiv) was added portionwise to a solution of N-mono(Boc)-p-xylylenediamine in tetrahydrofuran (100 mL) at 0° C. Gas evolution was observed. The grey suspension was stirred at 23° C. for 2 h, by which time gas evolution had ceased. The reaction mixture was refluxed for 16 h, then carefully quenched at 0° C. by the dropwise addition of water (1.8 mL). Gas evolution was seen. 15% Aqueous sodium hydroxide (1.8 mL) and water (5.4 mL) was added dropwise to the suspension at 23° C. The mixture was stirred at 23° C. for 0.5 h, then filtered. The filter cake was washed with tetrahydrofuran and dichloromethane. The filtrate was concentrated, providing crude N-mono(methyl)-p-xylylenediamine (0.68 g) as a yellow oil.

1. temperatureThe reaction mixture was refluxed for 16 h
2. customcarefully quenched at 0° C. by the dropwise addition of water (1.8 mL)
3. addition15% Aqueous sodium hydroxide (1.8 mL) and water (5.4 mL) was added dropwise to the suspension at 23° C
4. stirringThe mixture was stirred at 23° C. for 0.5 h
5. filtrationfiltered
6. washThe filter cake was washed with tetrahydrofuran and dichloromethane
7. concentrationThe filtrate was concentrated

ORD record

ord-bcfaa8bed2d049a78f65958754272179

Source dataset

uspto-grants-1997_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05656660