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3β,16α-dihydroxy-5α-androstan-17-one diacetate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

23457-56-9

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23457-56-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23457-56-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,4,5 and 7 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 23457-56:
(7*2)+(6*3)+(5*4)+(4*5)+(3*7)+(2*5)+(1*6)=109
109 % 10 = 9
So 23457-56-9 is a valid CAS Registry Number.

23457-56-9Relevant academic research and scientific papers

A new and concise way to enamides by fluoroalkanosulfonyl fluoride mediated Beckmann rearrangement of α,β-unsaturated ketoximes

Yan, Zhaohua,Xu, Yun,Tian, Weisheng

supporting information, p. 7186 - 7189 (2015/02/02)

The reaction of α,β-unsaturated ketoximes with fluoroalkanosulfonyl fluorides in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) underwent the Beckmann rearrangement smoothly to afford the corresponding acid-sensitive enamides in moderate to excellent yields, which provides a new efficient method for the preparation of acid-sensitive enamides.

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