1-Hydroxybenzotriazole → HCID 22867055, compound

Participants

Reaction Conditions

Reaction Steps

2-Aminomethyl-5-methyl-2,3,6,7-tetrahydrofuro-[2,3-f]quinoline-7-one (2.00 g, 8.70 mmol) was dissolved in dimethylformamide (150 ml). To the obtained solution, carbobenzyloxy-L-proline (2.80 g, 11.3 mmol), WSC-HCl (2.00 g, 11.3 mmol) and HOBT (1.53 g, 11.3 mmol) were added, and the mixture was stirred at 50° C. for 48 hours. The reaction mixture was condensed under reduced pressure. The resultant residue was extracted using a solvent mixture (chloroform: methanol=4:1) combined with 1N-HCl. The organic phase was washed with saturated aqueous NaCl solution, followed by drying and condensing under reduced pressure. The resultant residue was purified by silica gel column chromatography (chloroform: methanol=20:1). The crude crystals were subjected to a recrystallizing procedure using chloroform--methanol--ether. As a result, 1.69 g of the title compound was obtained as colorless powdery crystals (42.1%).

Provenance & Evidence