Hydrochloric Acid → 5-[(Benzyloxy)carbonyl]-5-azaspiro[2.4]heptane-6-carboxylic acid

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Reaction Steps

5-Aza-spiro[2.4]heptane-5,6-dicarboxylic acid 5-benzyl ester 6-methyl ester 603 (244 mg, 0.840 mmol) was dissolved in THF (2.0 mL)/MeOH (1.5 mL). An aqueous solution of LiOH (35.5 mg, 0.84 mmol) was added and stirring at room temperature was continued. After 3 hours, the reaction was neutralized with aqueous HCl (1 M) and the organic solvents were removed in vacuo. The crude mixture was diluted with water and EtOAc and the organic layer was collected. All volatiles were removed in vacuo and the crude acid 606 was used without further purification. LCMS-ESI+: calc'd for C15H17NO4: 275.3 (M+). Found: 276.3 (M+H+).

Provenance & Evidence