Sodium Hydroxide → 4-(2-tert-Butoxycarbonylamino-2-cyclohexyl-acetyl)-1-cyclopropanecarbonyl-octahydro-pyrrolo[3,2-b]pyrrole-3-carboxylic acid

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Reaction Steps

A solution of 44 (580 mg, 1.21 mmol) in MeOH (20 mL) was treated with 1M NaOH (4 mL) at ambient temperature. After 4 h, the solution was concentrated and diluted with EtOAc and 1M HCl. The layers were separated and the aqueous phase was extracted with EtOAc. The combined organic extracts were washed successively with 1M HCl, and brine, dried over anhydrous Na2SO4, filtered and concentrated to afford 45 (613 mg) as a yellow-colored foam which was used without further purification. Mass spectrum, m/z [464.6] (M+H)+.

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