2503-06-2 Usage
Description
Estra-5(10),9(11)-diene-3,17-dione is a synthetic steroid hormone that serves as an important intermediate in the pharmaceutical industry. It is characterized by its unique molecular structure, featuring a steroidal core with specific functional groups that enable its use in various chemical reactions and applications.
Uses
Used in Pharmaceutical Industry:
Estra-5(10),9(11)-diene-3,17-dione is used as a key intermediate in the synthesis of 3-keto-desogestrel, a potent progestin hormone. This intermediate plays a crucial role in the development of hormonal contraceptives and other medications that require the manipulation of hormone levels in the body.
As an intermediate, Estra-5(10),9(11)-diene-3,17-dione is essential for the production of various pharmaceutical compounds, particularly those related to reproductive health and hormone regulation. Its unique properties and reactivity make it a valuable component in the synthesis of these important medications.
Check Digit Verification of cas no
The CAS Registry Mumber 2503-06-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,5,0 and 3 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 2503-06:
(6*2)+(5*5)+(4*0)+(3*3)+(2*0)+(1*6)=52
52 % 10 = 2
So 2503-06-2 is a valid CAS Registry Number.
2503-06-2Relevant articles and documents
Preparation method of estra-4,9-diene-3,17-dione
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Paragraph 0033; 0034; 0035, (2019/01/08)
The present invention belongs to the field of synthesis of estra-4,9-diene-3,17-dione and discloses a preparation method of estra-4,9-diene-3,17-dione. The preparation method comprises preparation ofGrignard reagent, Grignard reaction, oxidation and hydrolysis reaction, and tandem cyclization reaction. The synthesis route designed in the present invention is characterized in that delta-lactone isused as the starting material and can be transformed to estra-4,9-diene-3,17-dione through three steps, namely, Grignard reaction, oxidation and hydrolysis reaction, and tandem cyclization reaction.The preparation method of estra-4,9-diene-3,17-dione is low in cost, low in environmental pollution, low in water consumption, easy to control, and high in yield with no need for highly toxic chemicals.
