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957785-23-8

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957785-23-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 957785-23-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,5,7,7,8 and 5 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 957785-23:
(8*9)+(7*5)+(6*7)+(5*7)+(4*8)+(3*5)+(2*2)+(1*3)=238
238 % 10 = 8
So 957785-23-8 is a valid CAS Registry Number.

957785-23-8Downstream Products

957785-23-8Relevant articles and documents

Total synthesis of streptonigrone

Chan, Bryan K.,Ciufolini, Marco A.

, p. 8489 - 8495 (2007)

(Chemical Equation Presented) A total synthesis of streptonigrone, 1, is described, which incorporates a one-step synthesis of substituted pyridones devised in our laboratory. Other aspects of the synthesis that differentiate the present approach from previous ones are the use of a Conrad-Limpach reaction, rather than the customary Friedlaender methodology, to assemble the quinoline segment of 1, and the implementation of an anionic sequence for the functionalization of a key pyridone intermediate.

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