4-(Chloromethyl)benzoyl chloride → Tert-butyl 4-(4-{[4-carbamoyl-2-(naphthalen-2-ylamino)thiazol-5-yl]carbamoyl}benzyl)piperazine-1-carboxylate

Participants

Reaction Steps

To a mixture of 5-amino-2-(naphthalen-2-ylamino)thiazole-4-carboxamide (0.5 g, 1.76 mmol) and N,N-diisopropylethylamine (0.3 mL, 1.94 mmol) in DMA (30 mL) was added 4-chloromethylbenzoyl chloride (0.37g, 1.94 mmol) at 0° C. The mixture was stirred for 3 hrs at rt. Then 1-Boc-piperazine (0.18 g, 0.95 mmol) was added to the mixture (0.083 g in 5 mL DMA), and the mixture was stirred for 16 hrs at rt. The reaction mixture was diluted with ethyl acetate (150 mL), washed with water, and dried over Na2SO4. The solvent was evaporated under reduced pressure, and the crude residue was purified by silica gel column chromatography eluted with 5% MeOH in DCM to give 0.010 g (11% yield) of the titled compound.

Provenance & Evidence