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Organic Reactions Volume 4 - Sciencemadness Dot Org

Organic Reactions Volume 4 - Sciencemadness Dot Org

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82 ORGANIC REACTIONS<br />

the methyl ester) over colloidal palladium or platinum oxide catalyst<br />

proceeds in a stepwise manner, and the hydrogenation may be inter-<br />

+<br />

CO2CH3<br />

I<br />

C<br />

I!<br />

c<br />

I<br />

CO2CH3<br />

-><br />

LTI<br />

CO2CH3<br />

CO2CH8<br />

CO2H<br />

JJ LVIII<br />

rupted after the A 4 -linkage has been saturated. By the addition of a<br />

second mole of hydrogen (exo addition) to 3,6-methano-A 1 -tetrahydrophthalic<br />

acid the eraZo-CT's-3,6-methanohexahydrophthalic acid is re-<br />

EH2<br />

H2<br />

CH8<br />

-f-<br />

H3C CH^<br />

H3CJT J<br />

LXIV LXT<br />

OCO2R<br />

CO2R<br />

CH3

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