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Volume 1A Threemembered Rings with all Fused Systems containing Threemembered Rings
Fivemembered Rings with Two Heteroatoms and Fused Carbocyclic Derivatives
Sixmembered Rings with One Heteroatom and Fused Carbocyclic Derivatives
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5-position acetic acid acyl addition adducts aldehydes alkenes alkyl alkynes amines amino analogues aromatic aryl atom benzene Benzo Derivatives bond bromine carbon carbonyl CHEC-I chemical shifts chloride CO2Et CO2H CO2Me compounds condensation conformation conjugated corresponding cyclization cycloaddition cycloaddition reactions dienophiles electron electrophilic enamines Equation esters ether EtOH example formation formed fragments give heteroatoms heterocyclic high yields hydrazine hydrogen hydrolysis hydroxy intermediate intramolecular isocyanates isomer isomeric ketones MeOH methanol method methyl mixture N-oxides nitriles nitrogen NMe2 nucleophilic º º obtained oxidation oxygen Ph Ph phthalazine prepared presence proton pyrazine pyridazine pyridine pyrimidine quinazoline quinoxaline react reactivity reagents rearrangement reduction reflux regioselective ring system salts Scheme Section sodium solvent sºo spectra spectroscopy structure substituents sulfur synthesis tautomer tautomeric temperature tetrazine thermal thiadiazine treatment triazine trioxanes undergo x-ray