Cyclopropylamine → 3-bromo-N-cyclopropyl-5-nitropyridin-4-amine
Reaction equation
[Br:1][C:2]1[CH:3]=[N:4][CH:5]=[C:6]([N+:9]([O-:11])=[O:10])[C:7]=1Cl.[CH:12]1([NH2:15])[CH2:14][CH2:13]1>ClCCl>[Br:1][C:2]1[CH:3]=[N:4][CH:5]=[C:6]([N+:9]([O-:11])=[O:10])[C:7]=1[NH:15][CH:12]1[CH2:14][CH2:13]1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of the product of Step 2 (8.01 g, ca. 30 mmol) in dichloromethane (100 ml) at 0° C. was added cyclopropylamine (4.16 ml, 60 mmol) drop-wise. The resulting mixture was stirred overnight at room temperature, then concentrated under vacuum to a residue and re-dissolved in ethyl acetate, basifying with sodium bicarbonate. The organic phase was washed with water three times, followed by twice with brine before concentrating under vacuum to a crude solid. This oil was purified by column chromatography eluting with a gradient of 50% DCM/hexane to DCM affording product as a yellow solid, 6.22 g (80%); MS (ES+) m/e 258/260 [M+H]+.