1-Methylpiperazine → HCID 86642823, compound

Participants

Reaction Steps

To a mixture of 0.16 g (0.40 mmole) of 4-(4-chloro-phenyl)-2-(5-formyl-2-nitro-phenylamino)-thiazole-5-carboxylic acid amide (VI.19b), 0.51 g (2.38 mmole) of sodium triacetoxy-borohydride and 15 mL of dichloromethane was added 0.07 mL (0.60 mmole) of 1-methylpiperazine. The mixture was stirred at room temperature for 18 hours. The mixture was diluted with dichloromethane and washed with saturated aqueous sodium bicarbonate solution and brine, dried over anhydrous magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography, eluting with methanol-dichloromethane (gradient 0:100-15:85) to give 0.16 g of 4-(4-chloro-phenyl)-2-[5-(4-methyl-piperazin-1-ylmethyl)-2-nitro-phenylamino]-thiazole-5-carboxylic acid amide (VI.19c).

Provenance & Evidence