2-Bromoethanol → 6-Amino-2-(butyloxy)-9-{[1-(2-hydroxyethyl)-4-piperidinyl]methyl}-7,9-dihydro-8H-purin-8-one

Participants

Reaction Conditions

Reaction Steps

2-(Butyloxy)-8-(methyloxy)-9-(4-piperidinylmethyl)-9H-purin-6-amine (for example, as prepared for Intermediate 28) (0.0335 g, 0.10 mmol) in DMF (0.4 mL) was added to 2-bromoethanol (commercially available, for example, from Aldrich) (0.0085 mL, 0.12 mmol). DIPEA (0.040 mL, 0.23 mmol) was added and the reaction mixture heated at 50° C. for 18 hours. Additional DIPEA (0.040 mL, 0.23 mmol) was added and heating continued for a further 18 hours. The reaction mixture was diluted with DMSO:MeOH (0.25 mL) and the resultant solution purified by MDAP (Method A). Appropriate fractions were combined and evaporated in vacuo. The residue was dissolved in 4M HCl in dioxane (0.2 mL) and allowed to stand at room temperature for 4 hours. The solvent was dried under a stream of nitrogen in the Radleys blowdown apparatus. The residue was redissolved in methanol (0.5 mL) and applied to top of 0.1 g aminopropyl SPE (preconditioned with methanol, 1.5 mL). The cartridge was washed with methanol (1.5 mL). The solvent was dried under a stream of nitrogen in the Radleys blowdown apparatus to give the title compound (0.0053 g).

Provenance & Evidence