Tyman, John

John H.P. Tyman Department of Chemistry, Brunei, The University of West London,... 

Giilacti Topcu Bruno Traber John Henry Paul Tyman Ayhan Ulubelen Francese Viladomat... 

Even if alizarin had served its time as a dyestuff for textiles, natural cochineal still finds broad application as a colourant for foodstuffs. Given the high expenditure required for isolation of the natural product, a ftiUy synthetic preparation of nature-identical kermesic and carminic acids can be attractive if one takes into account that higher prices can be realised for food colourants than for textile dyes. In this connection, the first total synthesis of carminic acid has been described by John Tyman and Pietro AUevi. [62,63]... 

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