Tyrian Purple: 6,6’-Dibromoindigo and Related Compounds

摘要: Abstract: The genesis of the purple dye from shellfish, its composition, origin,intermediates, analysis and synthesis components, 6,6’-dibromoindigo, 6-bromoindigo 6,6’-dibromoindirubin are reviewed Keywords: 6-bromoindigo, 6,6’-dibromoindirubin, tyrindoxyl,tyriverdin, tyrindoleninone, tyrindolinone, synthesis, structure, properties Introduction 6,6’-Dibromoindigo is a major component historic pigment Tyrian purple, also known asRoyal shellfish Purple Ancients. Arguably, it oldest pigment,the longest lasting, subject first chemical industry, most expensive best known.The colour derived exclusively marine Muricidae Thaisidae families. Thelong history, stretching back well into pre-chemical era, embracing chemistry, biology andsociology, contains not few misconceptions erroneous conclusions. This review attempts to setthe record straight.This molluscan has been since pre-Roman times in Mediterranean region thereis evidence for industry around 13th century B.C. [1] at Sarepta, now Sarafand, Lebanon. Theancient was distributed world-wide [2]. Surviving details ancient process areinsufficient explain chemistry involved this continuing speculation. But isclear that does exist mollusc generated precursors, sometimes termed