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|Purity:||99.5%||Color:||White Or White Crystalline Powder|
|Usage:||For Muscle Growth||Feature:||Natural , Healthy|
The chemical name of anastrozole is α,α,α',α'-tetramethyl-5-(1H-1,2,4-triazol-1-methyl)-1,3-benzenediacetonitrile, White or off-white crystalline powder; odorless, bitter. Soluble in acetonitrile or ethyl acetate, soluble in ethanol, almost insoluble in water. Clinically used for the treatment of advanced breast cancer in postmenopausal women.
Chinese name: anastrozole
Chinese alias: alatrozole; anastrozole; tetramethyl-5-(1H-1,2,4-triazol-1-ylmethyl)-1,3-benzenediacetonitrile; ICI-1) 1033 : ADRLLIDEX; anarozole; anastrozole; nalmefene hydrochloride. sodium mate, sodium melamine; nalmefene hydrochloride;
English name: anastrozole
English alias: ANASTRAZOLE; Anastrol; 2,2'-(5-((1H-1,2,4-Triazol-1-yl)methyl)-1,3-phenylene)bis(2-methylpropanenitrile);Anatrozole;ZD -1033; 1,3-benzenediacetonitrile; Anastrozol; ICI-D-1033; ARIMIDEX; 4-Triazol-1-ylmethyl)-1; Anastrozole; Anastrolozole;
CAS No.: 120511-73-1
Molecular formula: C17H19N5
Molecular weight: 293.36600
Exact quality: 293.16400
The third generation of aromatase inhibitors. For the treatment of patients with advanced breast cancer after menopause.
This product is a non-steroidal aromatase inhibitor, clinically used to treat advanced metastatic breast cancer in postmenopausal women.
This product is a potent and selective non-steroidal aromatase inhibitor. It can inhibit the conversion of androstenedione formed in the adrenal gland to estrone in postmenopausal patients, thereby significantly reducing plasma estrogen levels and producing a role in inhibiting the growth of breast tumors. In addition, this product has no significant effect on the production of adrenal corticosteroids or aldosterone.
Source (name), content (potency)
This product is α,α,α'α'-tetramethyl-5-(1H-1,2,4-triazol-1-ylmethyl)-1,3-diacetonitrilebenzene. According to the dry product, the C17H19N5 should not be less than 98.5%.
This product is white or off-white crystalline powder; odorless, bitter.
This product is soluble in acetonitrile or ethyl acetate, soluble in ethanol, and almost insoluble in water.
The melting point of this product (2010 edition of the Pharmacopoeia II Appendix VIC) is 81 ~ 84 ° C.
(1) Take about 5mg of this product, put it in a dry test tube, add about 50mg of malonic acid and 2ml of acetic anhydride, and heat it in a water bath of 85-95 °C for 10 minutes, the solution is brownish red.
(2) Take appropriate amount of this product and anastrozole reference substance, add about 5ml of acetonitrile to dissolve, dilute with mobile phase to make about 10μg of solution per 1ml, test according to the method under the relevant substances, for the test sample The retention time of the main peak of the solution should be consistent with the retention time of the main peak of the reference solution.
(3) The infrared absorption spectrum of this product should be consistent with the map of the control ("Infrared Spectral Collection of Drugs" 1151).
Take appropriate amount of this product, add about 5ml of acetonitrile to dissolve, dilute with mobile phase to make about 100μg solution per 1ml as the test solution; accurately measure 1ml, put it in a 100ml volumetric flask, dilute to the mark with mobile phase, Shake well as a control solution. According to high performance liquid chromatography (Appendix VD of the Pharmacopoeia, 2010), octadecylsilane bonded silica was used as a filler; acetonitrile-water (45:55) was used as the mobile phase; the detection wavelength was 210 nm. The number of theoretical plates is not less than 2,500 based on the peak of anastrozole. 20 μl of the control solution was injected into the liquid chromatograph to adjust the detection sensitivity so that the peak height of the main component peak was about 20% of the full scale; then 20 μl of the test solution and the control solution were accurately weighed and injected into the liquid chromatograph. , record the chromatogram to 2 times the retention time of the main component peak. If there is impurity peak in the chromatogram of the test solution, the single impurity peak area shall not be greater than 0.5 times (0.5%) of the main peak area of the control solution, and the sum of the impurity peak areas shall not be greater than the main peak area of the control solution (1.0%).
1. Compound (I) (Preparation method) is brominated by N-bromosuccinimide (NBS), and product (II) is treated with sodium triazole to obtain a product.
2. Preparation of 3,5-dibromomethyltoluene
Add 40g (0.33mol) of mesitylene, 0.5g (0.0027mol) of benzoyl peroxide and 1000ml of carbon tetrachloride to the reaction flask, and add 118.5g (0.67mol) of NBS in 4 batches under reflux and add 2h. Continue stirring for 1 h. Cool to room temperature, filter, filter residue washed with carbon tetrachloride (100 ml × 2), filter residue for succinimide can be recovered to produce NBS, the filtrate is evaporated to give a pale yellow liquid, and anhydrous ethanol is added. 200ml, shake, shake at room temperature overnight, precipitate white crystals. Filtration, drying, to obtain crude product, recrystallized from anhydrous ethanol to give 3,5-dibromomethyltoluene 76g, yield 80%, mp64oC.
3. Preparation of 3,5-dicyaniomethyltoluene
41.7g (0.15mol), KCN23.4g (0.36mol), TBAB (tetrabutylammonium bromide) 1.5g, CH2Cl2 120ml and water 60ml were added to the reaction flask, stirred and refluxed, and detected by TLC (GF254 plate, developing solvent Petroleum ether-ethyl acetate, volume ratio 5:1) until the reaction was completed, cooled, and the organic layer was separated. The aqueous layer was extracted with CH.sub.2Cl.sub.2 (50ml×3). The organic layer was combined, washed once with water, dried over anhydrous MgSO4 The filtrate is concentrated to dryness, and the remaining viscous liquid is added with 120 ml of carbon tetrachloride, shaken, layered at room temperature, solidified, filtered, washed with a small amount of carbon tetrachloride, drained, and dried to obtain 3,5-dicyanomethyltoluene 23 g. , yield 90%, mp72~73oC.
4. Preparation of 3,5-bis[(2,2-dimethyl)ethoxycyano]toluene
3,5-dicyanomethyltoluene 34g (0.15mol), methyl iodide 124g (0.87mol) and DMF 700ml were added to the reaction flask, and 44.5 g (0.96 mol) of sodium hydride was added in 6 portions by cooling in an ice water bath. After the addition of 2.5h, it was naturally warmed to room temperature and stirred overnight. TLC (GF254 plate, developing solvent ethyl acetate-petroleum ether, volume ratio 1:3), the reaction was complete. Add the reaction solution to 2500 ml of water and mix well. The mixture was allowed to stand, filtered, and the filter cake was washed with water three times, and dried to give a crude product (52 g), and recrystallized from anhydrous ethanol to obtain 40 g of 3,5-bis[(2,2-dimethyl)ethylcyano]toluene, yield 88.5%. , mp126~128oC.
5. Preparation of 3,5-bis[(2,2-dimethyl)acetamido]bromomethylbenzene
3,5-bis[(2,2-dimethyl)acetamido]toluene 34g (0.15 mol), NBS 27g (0.15 mol), benzoyl peroxide 1.5g (0.007 mol) and four were added to the reaction flask. 300ml of carbon chloride, stirred and refluxed for 2.5h, cooled, filtered, and the filter residue was washed twice with CCl4. The filtrate and washing solution were combined, and the solvent was evaporated to obtain a red viscous liquid 3,5-di[(2,2-dimethyl Ethyl cyano]bromomethylbenzene was used in the next step without purification.
6. Synthesis of alatrozole
8.2 g (0.12 mol) of 1,2,4-triazole, 16.6 g (0.12 mol) of anhydrous K2CO3, 6.7 g (0.12 mol) of KOH, and 2.0 g of tetrabutylammonium bromide (TBAB) were added to the reaction flask. , xylene xylene 200ml and 3,5-bis[(2,2-dimethyl)acetamido]bromomethylbenzene 30.5g (0.10mol), stirred under reflux, TLC detection (GF254 plate, the developer is petroleum ether - Ethyl acetate, volume ratio 3:1), complete reaction in about 7h. Cool to room temperature, filter out insoluble matter, wash with xylene, combine the filtrate and washing solution, distill off the xylene under reduced pressure, and the remaining sticky substance is dissolved in acetic acid The ester was washed with 150 ml of water, dried over anhydrous magnesium sulfate, and evaporated to ethyl acetate. EtOAc EtOAc EtOAc EtOAc EtOAc