Ethyl 7-{3,4-di(2-tetrahydropyranyloxy)-2-[3-(2-tetrahydropyranyloxy)octyl]cyclopentyl}hepta-2,4,6-trienoate → Ethyl 7-{3,4-di(2-tetrahydropyranyloxy)2-[3-(2-tetrahydropyranyloxy)octyl]cyclopentyl}heptanoate

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Reaction Steps

Ethyl 7-{3,4-di(2-tetrahydropyranyloxy)-2-[3-(2-tetrahydropyranyloxy)octyl]cyclopentyl}hepta-2,4,6-trienoate (6.1 g.) [prepared as described in (n) above] was dissolved in ethanol (100 ml.) and catalytically hydrogenated using a 5% palladium on charcoal catalyst, with a hydrogen pressure of 15 kg./cm2, at room temperature. The catalyst was then filtered off and the ethanol removed in vacuo to give ethyl 7-{3,4-di(2-tetrahydropyranyloxy)-2-[3-(2-tetrahydropyranyloxy)octyl]cyclopentyl}heptanoate (5.7 g.), which was used as starting material in the following preparation (p) of ethyl 7-[3,4-dihydroxy-2-(3-hydroxyoctyl)cyclopentyl]heptanoate without further purification.

Provenance & Evidence