Boldione

Androstadienedione is an important industrial-scale precursor for a wide variety of steroid hormones within the estrane and androstane classifications. Additionally, it has been used in the synthesis of testolactone (via a Baeyer-villiger rearrangement) and of atamestane. Boldione was used in a synthesis of 1-Testosterone. ==Preparation==

Androstadienedione is obtained in high yield from both plant and animal sterols by biotransformation. Biosynthesis The enzyme 3-oxosteroid 1-dehydrogenase produces boldione from androstenedione: ==Regulation==

United States In 2004 the United States Congress passed the Anabolic Steroid Control Act of 2005 which placed 36 steroids and over-the-counter prohormones into schedule III of the Controlled Substances Act. In this legislation boldenone was classified as a controlled substance and boldione remained legal. In April 2008 the United States Drug Enforcement Administration published an "Initial Notice of Proposed Rulemaking" concerning the scheduling of three anabolic substances: boldione, desoxymethyltestosterone, and dienedione. In 2008, at the time of the proposal, these three substances were listed as ingredients in more than 58 dietary supplements which were available for purchase over the counter. WADA Boldione is on the World Anti-Doping Agency's list of prohibited substances, and is therefore banned from use in most major sports. == References ==