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Addition of formaldehyde to levopimaric acid and methyl levopimarate

โœ Scribed by Settine, Robert L.; McClanahan, James L.


Book ID
126445521
Publisher
American Chemical Society
Year
1968
Tongue
English
Weight
316 KB
Volume
33
Category
Article
ISSN
0022-3263

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Stereochemistry of diels-alder addition
โœ Walter L. Meyer; Robert W. Huffman ๐Ÿ“‚ Article ๐Ÿ“… 1962 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 237 KB

## DIELS -Alder adducte of levopimaric acid (I) with many dienophiles are kn~wn.~ With symmetrical dienophiles, for example maleic anhydride, the reaction seems to he highly stereoselective, only one of four poseible isomers (IIa-d) being formed in high yield. Although it has been hypothesized, ad