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57942-17-3

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57942-17-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57942-17-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,9,4 and 2 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 57942-17:
(7*5)+(6*7)+(5*9)+(4*4)+(3*2)+(2*1)+(1*7)=153
153 % 10 = 3
So 57942-17-3 is a valid CAS Registry Number.

57942-17-3Upstream product

57942-17-3Downstream Products

57942-17-3Relevant articles and documents

Thermal ring contraction of 3H-1,4-benzo- diazepines into quinazolines

Kaname, Mamoru,Tsuchiya, Takashi,Sashida, Haruki

, p. 2407 - 2413 (2007/10/03)

The thermolysis of the 5-methoxy-(11a-c) and 5-diethylamino-3H-1,4- benzodiazepines (14a-c) resulted in a ring transformation to give the 4- methoxy-(12a-c) and 4-diethylaminoquinazolines (15a-c), respectively. The mechanism of this ring contraction is also described.

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