反应详情

To compound 13 (3.00 g, 4.12 mmol) were added acetonitrile (5 mL) and piperidine (2.4 mL) at room temperature, and the mixture was stirred at room temperature overnight. The solvent was evaporated under reduced pressure, and the obtained residue was subjected to silica gel column chromatography (eluent: dichloromethane-methanol (9:1)+0.05% pyridine) to give glycylglycine-4,4′-dimethoxytrityloxybutylamide (14) (1.13 g, 54%). The instrumental analysis values of glycylglycine-4,4′-dimethoxytrityloxybutylamide (14) are shown below.

1. customThe solvent was evaporated under reduced pressure