Adding a certain compound to certain chemical reactions, such as: 2913-97-5, name is N-(2-Oxoethyl)phthalimide, belongs to indolines-derivatives compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 2913-97-5, HPLC of Formula: C10H7NO3
EXAMPLE 28B Tert-butyl (2S,3S)-2-{[2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)ethyl]amino}-3-methylpentanoate To a solution of Example 28A (12.1 g) in methanol (20 mL) was added L-isoleucine tert-butyl ester hydrochloride (13.0 g, 58 mmol), sodium cyanoborohydride (7.3 g, 116 mmol), and acetic acid (2 mL). The resulting solution was stirred for 3 hrs at 25° C. and the methanol removed under vacuum, dichloromethane (500 mL) added, and the solution washed with aqueous NaHCO3 (2*300 mL). The organic layer was concentrated to give 12.9 g of the title compound.
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