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1150561-23-1

1150561-23-1

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1150561-23-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1150561-23-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,5,0,5,6 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1150561-23:
(9*1)+(8*1)+(7*5)+(6*0)+(5*5)+(4*6)+(3*1)+(2*2)+(1*3)=111
111 % 10 = 1
So 1150561-23-1 is a valid CAS Registry Number.

1150561-23-1Downstream Products

1150561-23-1Relevant articles and documents

PROCESS FOR THE PREPARATION OF DROSPIRENONE

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Page/Page column 6-7, (2009/06/27)

The present invention describes a process for the preparation of drospirenone (I) using androstendione as a starting material. In particular, androstendione protected on carbonyl group in position 3 as an enol-ether is functionalized in position 16 with a sulfoxide group and the derivative thus obtained undergoes thermal elimination in alkaline to give androsta-4,15- diene-3, 17-dione (V) which is further transformed into Drospirenone (I).

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