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2503-06-2

2503-06-2

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2503-06-2 Usage

Uses

Estra-5(10),9(11)-diene-3,17-dione, can be used as an intermediate for the synthesis of 3-keto-desogestrel.

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.

2503-06-2SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name 5(10),9(11)-Oestradien-3,17-dion

1.2 Other means of identification

Product number -
Other names ESTRA-5(10),9(11)-DIENE-3,17-DIONE

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:2503-06-2 SDS

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.

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