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Supstituisane karboksilne kiseline

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Adicija halogenovodoničnih k. naα,β-nezasićene k.RCHIz α,β-nezasićenih k. konjugovanom adicijom moženastati čitav niz sistema.CHCOOH+H /H 2OHXNH 3RCHCH 2 COOHOHRCHCH 2 COOHXRCHCH 2 COO-+ NH 33-hidroksikarboksilna k.(β-hidroksikiselina)3-halogenkarboksilna k.(β-halogenkiselina)3-aminokarboksilna k.(β-aminokiselina)HCNRCHCH 2 COOHCN3-cijanokarboksilna k.(β-cijanokiselina)Reakcija halogenovodonika sahidroksikiselinamaRCHCH 2COOHOHHXRCHCH 2COOHXX 2=Cl 2, Br 25

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