Natural Products Chemistry, Band 2

absolute configuration Ac₂O Ac₂O/py acid Acta aldehyde alkaloids Antibiotics benzene Biochem biosynthesis Bull carbonyl CH₂ CH₂OAC CH₂OH CH3 CH3 Chem Chemistry Chim Commun compounds COOEt COOH COOH COOH COOMe COOMe COOMe H cyclization D. H. R. Barton derivatives dioxane E. J. Corey ester EtOH Flavonoid formation H COOMe H H H H Me H H MeOOC H OH H OMe H₂N H₂O Helv HOOC hydrogen hydrolysis ibid intermediate irradiation isolated isomer isomerization Jeger ketones lactone Lett macrolide MeO OMe MeOH methyl mixture NaBH NaOH NH₂ obtained OCH3 OH H OH OH OH OH OMe olefins OMe MeO OMe OMe OMe oxidation oxygen Penicillium Pharm phenolic photochemical Photochemistry R₁ reaction rearrangement reduction Remarks ring Route Schaffner shown singlet stereochemistry Streptomyces Tetr triplet vitamin x-ray yield он