Naming & Synthesizing Testosterone (1935)
David & Laqueur's Naming, Butenandt & Ruzicka's Synthesis, and the Shared 1939 Nobel Prize, the Granular Account
Evidence grade 5 of 5, Settled. Read how the Atlas grades evidence.
The written rationale for this grade is still being prepared.
- FDA
- Not Applicable (1935 chemical discovery)
Reference only. Not medical advice.
What can go wrong
This entry is scientific history, not a treatment. Testosterone itself is a powerful hormone whose therapeutic and abuse risks are covered in dedicated TRT and anabolic-steroid entries; the historical caution is that the 1935 breakthrough also enabled the anabolic-steroid era.
This is something to take to a clinician. The Atlas can tell you what is known about naming & synthesizing testosterone (1935) in general. It cannot tell you what is happening in your body, and the difference matters most for exactly the symptoms that bring people to this page.
The deep account of testosterone's annus mirabilis, 1935. In Amsterdam, Karoly Gyula David, working in Ernst Laqueur's laboratory (an Organon-linked group), isolated the principal testicular androgen from bull testes and proposed the name 'testosterone' (testis + sterol + the ketone suffix -one), published in May 1935. Within months Adolf Butenandt at the Kaiser Wilhelm Institute in Germany and Leopold Ruzicka at ETH Zurich independently published chemical syntheses, Ruzicka and Wettstein's route from cholesterol-derived precursors made industrial production feasible. Butenandt and Ruzicka shared the 1939 Nobel Prize in Chemistry. This is the moment endocrinology became molecular.
1935: four months from first crystals to two independent syntheses, the molecule got a name and a factory route in a single year.
What people take it for
What it is taken for. Approval, where it exists, covers only some of these.
How it works
Testosterone (17-beta-hydroxyandrost-4-en-3-one) is a 19-carbon steroid built on the androstane skeleton: four fused rings, a 3-keto group and a 4,5 double bond in the A-ring, and a 17-beta hydroxyl. The 1935 syntheses established this structure and its relationship to cholesterol and to the previously characterized androsterone, anchoring testosterone within the emerging map of steroid chemistry that Butenandt and Ruzicka were jointly building.
What people get wrong
Often saidOne person discovered testosterone
ActuallyIt was a near-simultaneous, multi-team achievement in 1935: David/Laqueur isolated and named it; Butenandt and Ruzicka independently synthesized it. The Nobel was shared between Butenandt and Ruzicka in 1939.
Often saidIsolation and synthesis are the same thing
ActuallyIsolation (extracting the molecule from tissue) proved testosterone existed; synthesis (building it chemically, especially Ruzicka's scalable route) made it a manufacturable medicine. Both happened in 1935, which is why the year is so pivotal.
Who profits, and who pushes back
Nobody is named here yet, because we have not done that work on this entry. Read that as unfinished. Somebody almost certainly sells this, and somebody almost certainly disputes it. Assume both until we have checked.
How we got here
By 1935 the field had the pieces but not the molecule. Berthold (1849) had shown a blood-borne testicular factor; Brown-Sequard (1889) had popularized organotherapy; and in 1931 Butenandt had isolated androsterone from male urine (reportedly from enormous volumes), a weaker androgen. The decisive year was 1935. In Amsterdam, Karoly Gyula David, a Hungarian-born chemist working in the pharmacology laboratory of Ernst Laqueur, which had close ties to the Dutch firm Organon, isolated the main, more potent testicular androgen from bull testes and, with colleagues including Dingemanse and Freud (Joseph Freud), reported it in a May 1935 paper, coining the name testosterone. Naming it, however, was not the same as being able to make it. Two chemists solved that within months and largely independently: Adolf Butenandt at the Kaiser Wilhelm Institute for Biochemistry in Berlin, and Leopold Ruzicka with Albert Wettstein at ETH Zurich (working with the firm Ciba). Ruzicka and Wettstein's semisynthesis from cholesterol-related precursors was especially important because it offered a practical, scalable route, turning testosterone from a trace extract into a manufacturable drug. The chemical and biological communities recognized the magnitude immediately: in 1939 the Nobel Prize in Chemistry was awarded jointly to Butenandt 'for his work on sex hormones' and Ruzicka 'for his work on polymethylenes and higher terpenes.' (Butenandt, under Nazi-era German policy, was initially prevented from accepting and received the medal later.) The 1935 isolation-plus-synthesis is the true scientific foundation that the placebo eras of Brown-Sequard, Voronoff, and Steinach had only gestured toward, and it is the direct ancestor of every modern testosterone product and every anabolic steroid.
- 1931Butenandt isolates androsterone from male urine
- May 1935David, Laqueur et al. isolate and name testosterone (Amsterdam)
- 1935Butenandt (Berlin) reports a synthesis
- 1935Ruzicka & Wettstein (ETH Zurich/Ciba) report a scalable semisynthesis
- 1939Nobel Prize in Chemistry shared by Butenandt and Ruzicka
What we do not know
- How did the Organon/Laqueur and Ciba/Ruzicka commercial ties shape the speed of the 1935 discoveries?
- How should the contributions of the less-credited Amsterdam team (David, Dingemanse, Joseph Freud) be weighted against the Nobel laureates?
At a glance
- Isolation & naming
- Karoly Gyula David, Ernst Laqueur and colleagues, Amsterdam, May 1935
- Name etymology
- testis + sterol + -one (ketone suffix)
- Source tissue
- Bull testes (large quantities processed for tiny yields)
- Synthesis
- Butenandt (Germany) and Ruzicka & Wettstein (ETH Zurich), both 1935
- Industrial route
- Ruzicka/Wettstein semisynthesis from cholesterol-related steroids
- Nobel Prize
- Chemistry 1939, shared by Butenandt and Ruzicka
What this entry does not yet cover
What follows is unfinished work on our side, not a finding about Naming & Synthesizing Testosterone (1935). A short entry is not a safe entry.
- Cost and market. We have not documented what it sells for or who sells it.
- Supply chain. We have not mapped where it is made.
- Who uses it. We have not documented the user groups.
- What could change. No forward-looking summary yet.
- How it compares. We have not set it against the alternatives.
- Children and teenagers. We have not checked what is known about younger people.
Sources
The studies below are named and described, but not linked. You cannot open them from here and check our reading against them, which means this page is our summary of the literature rather than a document you can verify. Weigh it accordingly until the links exist.
The studies that matter
David, Dingemanse, Freud & Laqueur, isolation and naming of testosterone1935Crystalline androgen isolated from bull testes; named 'testosterone'
Butenandt & Hanisch, synthesis of testosterone1935Independent chemical synthesis of the hormone in Germany
Ruzicka & Wettstein, partial synthesis of testosterone1935Semisynthesis from cholesterol-derived precursors, enabling scalable production