N-methyl-2-pyrrolidone → HCID 136005594, compound

Participants

Reaction Steps

Combine (S)-2-(2-naphthalen-2-yl-ethyl)-piperazine (854 mg, 3.72 mmol), 2-methyl-4H-3-thia-4,9-diaza-benzo[f]azulen-10-ylamine (895 mg, 3.72 mmol) and 1-methyl-2-pyrrolidinone (8 mL). Heat at reflux. After 5 h, cool to ambient temperature and dilute with ethyl acetate and water. Extract with ethyl acetate. Wash the extracts with water and brine, dry over sodium sulfate, filter and concentrate the filtrate. Purify by silica gel chromatography using 2N ammonia in methanol-methylene chloride (2.5%) as the eluent to give 576 mg (34%) of the title compound: mass spectrum (ion spray): m/z=453 (M+1), 451 (M−1). HR-MS calculated for C28H29N4S: 453.2113. Found 453.2116. HPLC: Symmetry C18 column (3.5 μm, 4.6×50 mm). Gradient 5% to 90% solvent B in 7 min. Solvent A was 0.1% (v/v) TFA in water and solvent B was acetonitrile. Retention time 5.7 min; 100% pure.

Provenance & Evidence