2,2-Dimethoxypropane → HCID 86733713, compound

Participants

Reaction Steps

A solution of 2.19 g of (1S,2S,5S)-5-(1,2,3,4-tetrahydro-6-methoxy-2-naphthyl)-2-hydroxy-1-methylcyclo-pentaneacetic acid and 5 ml of 2,2-dimethoxypropane in 40 ml of methanol containing 0.05 g of p-toluenesulfonic acid monohydrate is refluxed for 18 hours. The resultant solution is partitioned between aqueous 5% sodium bicarbonate and ether. The ether phase is separated, dried over magnesium sulfate, and stripped of solvent by vacuum distillation. The residue is crystallized from a mixture of acetone and hexane to give methyl (1S,2S,5S)-5-(1,2,3,4-tetrahydro-6-methoxy-2-naphthyl)-2-hydroxy-1-methylcyclopentaneacetate melting at approximately 86°-87°.

Provenance & Evidence