Syntex

Laboratorios Syntex SA was a pharmaceutical company formed in Mexico City in 1944 by Russell Marker to manufacture therapeutic steroids from the Mexican yams called cabeza de negro (Dioscorea mexicana) and Barbasco (Dioscorea composita). The demand for barbasco by Syntex initiated the Mexican barbasco trade.

Syntex chemists synthesized cortisone from diosgenin, a phytosteroid contained in Mexican yams. This synthesis was more economical than the previous Merck & Co. synthesis, which started with bile acids.

Syntex was integrated into the Roche group in 1994.

Syntex submitted its compound to a laboratory in Madison, Wisconsin, for biological evaluation, and found it was the most active, orally-effective progestational hormone of its time. Syntex submitted a patent application in November 1951. In August 1953, G.D. Searle & Co. filed for a patent for the synthesis of the double-bond isomer 13 of norethisterone called noretynodrel. Noretynodrel is converted into norethisterone under acidic conditions, such as those in the human stomach, and the new patent did not infringe on the Syntex patent. Searle obtained approval to market noretynodrel before Syntex received its approval. By 1964 three companies including Syntex were marketing 2-mg doses of the Syntex norethisterone.

Syntex's submission of a fraudulent toxicology analysis of naproxen largely led to the Food and Drug Administration's uncovering of extensive scientific misconduct by Industrial Bio-Test Laboratories in 1976.

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