Description: Trenbolone is a kind of anabolic androgenic steroid belonging to the 19-nortestosterone group. It can be supplied to veterinary medicine of livestock in order the boost muscle growth and appetite. It can also enhance the performance of athletes. It has several physiological effects: (1) enhance protein synthesis and nitrogen retention in the muscle tissues, which boost enhanced anabolism; (2) greatly promote insulin-like growth factor-1 (IGF-1) which is a highly effective anabolic hormone; (3) Greatly increase the red blood cell count to boost blood oxygenation which leads to improved muscular endurance; (4) Inhibit glucocorticoid hormones which inhibit the growth of muscle tissue and promote fat. (5) Improve food efficiency.
Stage A: Preparation of 17 -Benzoyloxy-Estra-4,9,11-Trien-3-one - 0.400 g of 17 -benzoyloxy-4,5-seco-estra-9,11-diene-3,5-dione is dissolved in 4 cc of toluene under an inert atmosphere. The solution is cooled to 3 C, then 0.48 cc is added of the solution of sodium tert-amylate in anhydrous toluene, diluted by the addition of a further 4.8 cc of anhydrous toluene.
This reaction mixture is kept between 0 C and +5 C for six hours, with agitation and under an inert atmosphere, then 5 cc of a 0.2 N solution of acetic acid in toluene are added. The mixture is extracted with toluene, and the extracts are washed with water and evaporated to dryness. The residue is taken up in ethyl acetate, and then the solution is evaporated to dryness in vacuo, yielding a resin which is dissolved in methylene chloride, and the solution passed through a column of 40 g of magnesium silicate. Elution is carried out first with methylene chloride, then with methylene chloride containing 0.5% of acetone, and 0.361 g is thus recovered of a crude product, which is dissolved in 1.5 cc of isopropyl ether; then hot methanol is added and the mixture left at 0 C for one night.