Bicyclo[2.2.1]heptane-1-methanesulfonic acid, 7,7-dimethyl-2-oxo-, (1S)- → HCID 73102692, compound

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Reaction Steps

The crude β,δ-dihydroxy-6-heptenoic acid, methyl ester from the previous step was dissolved in a mixture of 30 ml of dichloromethane and 10 ml of 2,2-dimethoxypropane. Camphorsulfonic acid (0.05 g) was added, and the mixture was stirred overnight. Concentration of the reaction mixture and flashchromatography of the residue yielded 1.1 g of 6-ethenyl-2,2-dimethyl-1,3-dioxane-4- acetic acid, methyl ester which was employed in the subsequent step without further purification.

Provenance & Evidence