Potassium Carbonate → 4-(2-Chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-ylmethyl)-3,3-dimethyl-piperazine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

A mixture of 8-bromomethyl-2-chloro-9-methyl-6-morpholin-4-yl-9H-purine (400 mg, 1.16 mmol), 3,3-dimethylpiperazine-1-carboxylic acid tert-butyl ester (250 mg, 1.17 mmol) and K2CO3 (176 mg, 1.28 mmol) in DMF (20 mL) was allowed to stir at r.t. for 16 h. The reaction mixture was loaded onto an Isolute® SCX-2 cartridge which was washed with MeOH and the product eluted with 2M NH3/MeOH. The resulting residue was purified by column chromatography (Si—PCC, MeOH:DCM, 0-10%) affording the title compound (150 mg, 27%). 1H NMR (CDCl3, 400 MHz): δ 4.26 (4 H, brd s), 3.82-3.80 (9 H, m), 3.33 (2 H, brd s), 3.22 (2 H, brd s), 2.42-2.35 (2 H, m), 1.45 (9 H, s), 1.15 (6 H, s).

Provenance & Evidence