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21237-55-8

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21237-55-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21237-55-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,3 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21237-55:
(7*2)+(6*1)+(5*2)+(4*3)+(3*7)+(2*5)+(1*5)=78
78 % 10 = 8
So 21237-55-8 is a valid CAS Registry Number.

21237-55-8Downstream Products

21237-55-8Relevant academic research and scientific papers

An efficient synthesis of the optically active isomers of 2H-1,4-benzoxazine derivatives, novel KATP channel modulators

Piemontese, Luca,Laghezza, Antonio,Fracchiolla, Giuseppe,Carbonara, Giuseppe,Tortorella, Paolo,Loiodice, Fulvio

, p. 791 - 795 (2013/08/23)

2H-1,4-Benzoxazine amidine derivatives are drugs acting as modulators of the skeletal muscle and pancreatic beta cell ATP-sensitive-K+ (KATP) channels. With the aim of evaluating the influence of absolute configuration on the biological activity of these drugs, we herein report the optimization of a synthetic route to obtain both enantiomers of some of these compounds with improved chemical yield and high enantiomeric excess.

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