Reaktion #635

Reaktionsgleichung

Clc1ccnc(Nc2ccccc2)c

NCc1ccccc1

→

c1ccc(CNc2ccnc(Nc3cc

Ausbeute 53.8%

Lösungsmittel

CC(=O)N(C)C

Reaktionsbedingungen

Vorschrift

Phenylmethanamine (57.6 mg, 0.54 mmol), 4-chloro-N-phenylpyridin-2-amine (100 mg, 0.49 mmol) and sodium 2-methylpropan-2-olate (94 mg, 0.98 mmol) were suspended in DMA (2 mL) and sealed into a microwave tube. Nitrogen was bubbled through the reaction mixture for 5 minutes. (R)-(-)-1-[(S)-2-(DICYCLOHEXYLPHOSPHINO)FERROCENYL]ETHYLDI-T-BUTYLPHOSPHINE (32.5 mg, 0.06 mmol) and diacetoxypalladium (8.78 mg, 0.04 mmol) were added to the reaction mixture and nitrogen was bubbled through the reaction mixture for a further 5 minutes. The reaction was heated thermally to 100 °C for 30 mins under nitrogen and cooled to RT. The reaction mixture was neutralised with HCl and purified by ion exchange chromatography, using a 20 g SCX column. The crude product was purified by preparative HPLC (Waters SunFire column, 5µ silica, 50 mm diameter, 100 mm length), using decreasingly polar mixtures of water (containing 0.1% formic acid) and MeCN as eluents. Fractions containing product were evaporated to dryness to afford N4-benzyl-N2-phenylpyridine-2,4-diamine (72.4 mg, 53.8 %) as an off-white solid.

Quelle