Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Allo-Protolichesterinic acid

Lichesterylic acid and methyl protolichesterinate have been found in Cetraria islandica (555) the latter ester was prepared from the potassium salt of protolichesterinic acid and methyl iodide 413). Allo-protolichesterinic acid adds diazomethane to form isomeric pyrazoline methylesters, the stereochemistry of which was established by their respective CD spectra. Hydrogenation of allo-protolichesterinic acid with Pd-C in acetic acid produces a mixture of (-)-dihydro-allo-protolichesterinic acid (33), (-)-nephromopsinic acid (34) and (-)-lichesterinic acid (35) (see Scheme 34). [Pg.36]

Scheme 34. Reaction of allo-protolichesterinic acid with diazomethane and its hydrogenation... Scheme 34. Reaction of allo-protolichesterinic acid with diazomethane and its hydrogenation...
Scheme 31. Synthesis of racemic protolichesterinic, allo-protolichesterinic and nephrosterinic acids (58)... Scheme 31. Synthesis of racemic protolichesterinic, allo-protolichesterinic and nephrosterinic acids (58)...
See other pages where Allo-Protolichesterinic acid is mentioned: [Pg.32]    [Pg.113]    [Pg.32]    [Pg.113]    [Pg.34]   
See also in sourсe #XX -- [ Pg.142 ]

See also in sourсe #XX -- [ Pg.34 , Pg.35 , Pg.38 ]



SEARCH



Protolichesterinic acid

© 2024 chempedia.info