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97388-86-8

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97388-86-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97388-86-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,3,8 and 8 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 97388-86:
(7*9)+(6*7)+(5*3)+(4*8)+(3*8)+(2*8)+(1*6)=198
198 % 10 = 8
So 97388-86-8 is a valid CAS Registry Number.

97388-86-8Downstream Products

97388-86-8Relevant articles and documents

Cycloaddition of Benzodiazepine Nitrones to Alkynes: Synthesis and X-Ray Analysis of Some Tricyclic Quinoxalines.

Capozzi, Giuseppe,Ottana, Rosaria,Romeo, Giovanni,Sindona, Giovanni,Uccella, Nicola,Valle, Giovanni

, p. 2026 - 2048 (2007/10/02)

7-Chloro-2-methylamino-5-phenyl-3H-benzodiazepine 4-oxide (chlordiazepoxide) undergoes 1,3-dipolar cycloaddition to electron-deficient alkynes yielding condensed 4-isoxazoline benzodiazepine and pyrrole-fused quinoxaline derivatives.The structure of the reaction products was determined by analytical and spectroscopic methods with the application of LIS and X-ray analysis.The overall process involves an initial addition step, the rate determing one, followed by ring-opening of the 4-isoxazoline intermediate, ring-contraction of the seven-membered nucleus to the quinoxaline system, and subsequent condensation to the tricyclic derivatives.The suitable stereochemistry and the N-O vinylic functionality, forming a good leaving group in the 4-isoxazolines, drive the 1,2-bond migration from carbon to the electron-deficient nitrogen atom of the benzodiazepine ring.The energetics of the condensation steps are discussed on the basis of thermochemical considerations postulating a kinetic effect for the pyrrole-ring closure due to the extended delocalization of the enolate intermediate.

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