1,1'-Carbonyldiimidazole → HCID 66589657, compound

Participants

Reaction Steps

A mixture of 3-(5-aminomethyl-1-oxo-1,3-dihydro-isoindol-2-yl)-piperidine-2,6-dione methanesulfonic acid salt (1.25 g, 3.39 mmol) and CDI (0.61 g, 3.73 mmol) in DMF (10 mL) was stirred at RT overnight. 4-Amino-piperidine-1-carboxylic acid tert-butyl ester (0.68 g, 3.39 mmol) was then added and the mixture was stirred overnight. The mixture was purified by preparative HPLC to give 4-{3-[2-(2,6-dioxo-piperidin-3-yl)-1-oxo-2,3-dihydro-1H-isoindol-5-ylmethyl]-ureido}-piperidine-1-carboxylic acid tert-butyl ester as an off-white solid (0.46 g, 27% yield). The product was used in the next step without further purification. HPLC, Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 ml/min, 240 nm, 30/70 CH3CN/0.1% H3PO4, 4.35 min (99.4%).

Provenance & Evidence