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chemistry organic organicchemistry organic synthesis asymmetric synthesis retrosynthesis organic chemistry education total synthesis disconnections synthesis chirality chiral totalsynthesis enantioselectivity substrate control enantioselective catalysis shape alkenes enantiomers chemistryoflivingsystems organocatalysis stereochemistry asymmetric catalysis chiral reagents bonding functionalgroupinterconversions spectroscopy aldol carbonyl orbitals chiral auxiliaries epothilone oxidation reduction ir oils diastereoiosmers nmr cyclohexane strain fats conformations baeyer-villiger reagents science shapes molecules handedness electrons introduction fg groups functional names bond strength length resonance polarity solubility dipoles massspectrometry infraredspectroscopy nuclearmagneticspectroscopy chemistrylivingofsystems boatconformation chairconformation resonancestructures resonancehybrids intermolecularforces hydrogenbonding alkynes dienes natural products drugs sweeteners pharmaceutical higher education catalysis educacion radical radical chemistry reactions alcohols susbtitution functional_groups organic_chemistry mechanisms enolate wittig 14-additions enolates triglycerides callipeltosidec fattyacids michaeladditions conjugateadditions functionalgroupinterconversion c-cbondformation hydridereducingreagents carboxylicacidderivatives protectinggroups carboxylicacids