2-Pyridinemethanamine → HCID 18399976, compound

Temperature

0 °C

2-(Aminomethyl)pyridine (2.0 g, 18.5 mmol) was added dropwise to a stirred solution of benzoyl isothiocyanate (3.3 g, 20.2 mmol) in CH2Cl2 (30 mL) at 0° C. The mixture was stirred at 0° C. for 4 h. The solvent was evaporated in vacuo and 1M sulfuric acid (40 mL) was added. The reaction mixture was stirred at rt for 19 h. The mixture was neutralized with saturated sodium carbonate (aq.). The oil that formed in the solution during neutralization was removed with a spatula. The solid was collected, washed and dried. The solid was then dissolved in sodium hydroxide (10% aq., 15 mL) and MeOH (5 mL) and the solution was stirred at r.t. for 20 h. The reaction mixture was neutralized with 2M sulfuric acid and the aqueous solution was extracted with ethyl acetate (2×50 mL). The organic phase was treated with activated charcoal, filtered, dried (Na2SO4) and evaporated. The residue was suspended in diethyl ether, filtered, washed with diethyl ether and dried, giving the title compound (1.35 g, 44%) as a solid. The crude product was used in the next step without further purification.

1. customThe solvent was evaporated in vacuo and 1M sulfuric acid (40 mL)
2. additionwas added
3. stirringThe reaction mixture was stirred at rt for 19 h
4. customThe oil that formed in the solution during neutralization
5. customwas removed with a spatula
6. customThe solid was collected
7. washwashed
8. customdried
9. dissolutionThe solid was then dissolved in sodium hydroxide (10% aq., 15 mL)
10. stirringMeOH (5 mL) and the solution was stirred at r.t. for 20 h
11. extractionthe aqueous solution was extracted with ethyl acetate (2×50 mL)
12. additionThe organic phase was treated with activated charcoal
13. filtrationfiltered
14. dry with materialdried (Na2SO4)
15. customevaporated
16. filtrationfiltered
17. washwashed with diethyl ether
18. customdried

ORD record

ord-7352bea0174f41659a4a172c86f54d19

Source dataset

uspto-grants-2011_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08026244B2