1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 67197065, compound

Participants

Reaction Steps

A mixture of 246 mg of [1-(2-cyclopentyl-6,6-dioxo-5,7-dihydrothieno[3,4-d]pyrimidin-4-yl)piperidin-4-yl]acetic acid, 75 mg of ammonium carbonate, 0.11 g of HOBt, 0.16 g of EDCI, and 6 ml of DMF was stirred at ambient temperature for 3 days. The solvent was distilled off under reduced pressure, water was added to the residue, and the mixture was extracted with EtOAc. The organic phase obtained was washed with a saturated aqueous sodium bicarbonate and brine and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue obtained was purified by silica-gel column chromatography (chloroform-MeOH) to yield a foamy product. This product was dissolved in THF, here was added 4M HCl-dioxane solution, the solution was concentrated under reduced pressure, the residue was washed with ether to yield 184 mg of [1-(2-cyclopentyl-6,6-dioxo-5,7-dihydrothieno[3,4-d]pyrimidin-4-yl)piperidin-4-yl]acetamide hydrochloride.

Provenance & Evidence