title: Short and regiospecific synthesis of echinamine A--the pigment of sea urchin Scaphechinus mirabilis.
abstract: New convenient two-step synthesis of natural pigment echinamine A by the condensation of 2,3-dichloro-6-ethyl-7-hydroxy-1,4-naphthoquinone with sodium nitrite and subsequent reduction of intermediate 7-ethyl-2,5,6,8-tetrahydroxy-3-nitro-1,4-naphthoquinone has been developed.
authors.affiliation: Pacific Institute of Bioorganic Chemistry FEB RAS, Vladivostok, 690022, Russian Federation.
authors.forename: Nikita S
authors.initials: NS
authors.lastname: Polonik
authors.forename: Viktor P
authors.initials: VP
authors.lastname: Anufriev
authors.forename: Sergey G
authors.initials: SG
authors.lastname: Polonik
mesh_terms: D000818:Animals; D009285:Naphthoquinones / Q000138:chemical synthesis*; D010860:Pigments, Biological / Q000138:chemical synthesis*; D012617:Sea Urchins / Q000737:chemistry*
chemical_list: D009285:Naphthoquinones; D010860:Pigments, Biological; C505310:echinamine A