Phthalimide → [3-(3-Chloro-phenyl)-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propyl]-carbamic acid tert-butyl ester

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Reaction Steps

To a stirred solution of [3-(3-chloro-phenyl)-3-hydroxy-propyl]-carbamic acid tert-butyl ester (12 g, 42 mmol), phthalimide (6.2 g, 42 mmol), and PPh3 (14.3 g, 55 mmol) in THF (150 mL) was added DEAD (9.0 mL, 55 mmol) dropwise at about 5° C. After 1 hour, the mixture was concentrated to dryness. The residue was purified by column chromatography (ethyl acetate:petroleum ether, 1:8) to afford [3-(3-chloro-phenyl)-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-propyl]-carbamic acid tert-butyl ester. (Yield 15.65 g, 90%).

Provenance & Evidence