Several possible improvements are also proposed.Ģ. Their efforts are surveyed and critically evaluated herein from the perspective of convenience, cost, safety and yield. Over the past century a variety of groups have undertaken to develop rational syntheses of this historic dye. Paul Friedländer, who in 1909 first identified the structure of the dye as 6,6'-dibromoindigo, required 12,000 Murex brandaris snails to produce 1.4 g of pure pigment. Due to the minute amounts of dye found in the snails, the dye has always been very costly. From ancient times the dye has been produced from secretions of various species of snails found off the Atlantic and Mediterranean coasts. Keywords: 6,6'-dibromoindigo Tyrian purple synthesisĦ,6'-Dibromoindigo (1 see Scheme 1) is the chemical structure of the major component of Tyrian purple, the most famous dye of antiquity.

These synthetic routes have been exhaustively surveyed and critically evaluated from the perspective of convenience, cost, safety and yield. Received: 18 June 2010 in revised form: 29 July 2010 /Accepted: 2 August 2010 / Published: 10 August 2010Ībstract: Over the past century, various synthetic approaches have been suggested to the most famous dye of antiquity, Tyrian purple (6,6'-dibromoindigo). Preparation of Tyrian Purple (6,6'-Dibromoindigo): Past and Presentĭepartment of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel

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