Pyrrolidine → 2-(Pyrrolidin-1-yl)-4-amino-m-xylene

Participants

Reaction Conditions

Reaction Steps

To a solution of the 3-bromo-2,4-dimethylphenylamine (0.6 g, 3.0 mmol) in toluene (10 mL) and pyrrolidine (1.25 mL, 15 mmol) was added sodium-t-butoxide (0.86 g, 9 mmol, 3 eq). The suspension was deoxygenated by passing a stream of N2 gas through the mixture for approximately 5-10 minutes before introducing the tris(dibenzilidene)dipalladium(0) (Pd2(dba)3) (27 mg) and rac-2,2′Bis(diphenylphosphino)-1,1′binaphthyl (BINAP) (25 mg). The nitrogen stream continued 10 minutes before heating at 100° C. overnight. The reaction mixture was cooled, acidified with HCl (2N) and extracted with diethyl ether. The aqueous layer was adjusted basic and re-extracted with ethyl acetate. The organic layer was dried over sodium sulfate, decanted and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel, gradient elution with 6:1 to 4:1 hexanes to ethyl acetate) to give the desired 2-(pyrrolidin-1-yl)-4-amino-m-xylene.

Provenance & Evidence