Water → (+/-)-tert-Butyl 3-{3-[(cyclopentyl{4-[(1-oxo-1,3-dihydro-2H-isoindol-2-yl)methyl]phenyl}-acetyl)amino]-2-methylphenyl}propanoate

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Reaction Steps

At RT, 50 mg (0.11 mmol) of (+/−)-tert-butyl 3-[3-({[4-(aminomethyl)phenyl](cyclopentyl)acetyl}amino)-2-methylphenyl]propanoate and 16.4 mg (0.12 mmol) of phthaldialdehyde were dissolved in 2.5 ml of glacial acetic acid, and the mixture was left to stand for 1 h. The reaction mixture was then poured into water and extracted with ethyl acetate. The organic phase was dried over magnesium sulfate and concentrated. The residue was purified by preparative RP-HPLC. This gave 53 mg (85% of theory) of the target compound.

Provenance & Evidence