Potassium Hydroxide → HCID 68145100, compound

Participants

Reaction Steps

To a solution of 3.33 g of (1S,2S,5S)-2-acetoxy-5-(1,2,3,4-tetrahydro-6-methoxy-2-naphthyl)-1-methylcyclo-pentaneacetic acid in 50 ml of methanol is added a solution of 3.00 g of potassium hydroxide in 15 ml of water. The resultant solution is refluxed for 2 hours, then diluted with 250 ml of water. Clarification is effected by filtration. The filtrate is acidified with hydrochloric acid. A solid precipitates which, isolated by filtration and recrystallized from a mixture of ethyl acetate and hexane, affords (1S,2S,5S)-5-(1,2,3,4-tetrahydro-6-methoxy-2-naphthyl)-2-hydroxy-1-methylcyclopentaneacetic acid melting at approximately 141.5°-142.5°. The product has a specific rotation of +65°.

Provenance & Evidence