Isopropyl iodide → Latanoprost

Participants

Reaction Conditions

Reaction Steps

A mixture of Latanoprost acid [13b] (0.95 g, 2.4 mmol), isopropyl iodide (0.83 g, 4.8 mmol), cesium carbonate (1.20 g, 3.6 mmol) and DMF (20 mL) was stirred for 2-3 hours at 40-50° C. (TMC monitoring) and poured into a stirred mixture of 2 M aqueous NaHSO4 (2.5 mL, 5 mmol), ice (50 mL) and ether (50 mL). The organic layer was separated and the water phase was extracted with ether (2×50 mL). The combined organic layers were washed with brine (50 mL), dried over sodium sulfate, filtered and evaporated under reduced pressure to give 1.05 g (100% yield) of crude product. The crude product was purified by column chromatography on silica gel (hexane/ethyl acetate 1:1 v/v) to give Latanoprost. 1H NMR (CDCl3) is compatible with literature data.

Provenance & Evidence