Hydrochloric Acid → HCID 86611240, compound

Participants

Reaction Steps

The macrocyclic ester 1e from Step C (1.0 g, 2.1 mmol) was first dissolved in THF (3.0 mL), then methanol (3.0 mL) and water (1.5 mL) were added, followed by addition of LiOH—H2O (3 equiv). The resulted mixture was stirred for 4 h and concentrated to dryness. The residue was first re-dissolved in water (10 mL), then acidified with aqueous HCl (3.0 N, 2.2 mL, 6.6 mmol). The aqueous was extracted with EtOAc (3×15 mL). The combined organic layers was dried with sodium sulfate and concentrated to give the acid product 1f (0.93 g, 99%). MS (ESI+): 450 [M+1] (5) and 350 [M+1−100] (100).

Provenance & Evidence