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97130-05-7

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97130-05-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97130-05-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,1,3 and 0 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 97130-05:
(7*9)+(6*7)+(5*1)+(4*3)+(3*0)+(2*0)+(1*5)=127
127 % 10 = 7
So 97130-05-7 is a valid CAS Registry Number.

97130-05-7Relevant articles and documents

Diels-alder cycloadditions of 1,3,4,-oxadiazin-6-ones with electron rich pi systems

Padwa, Albert,Eisenbarth, Philipp

, p. 283 - 296 (2007/10/02)

A study of the cycloaddition behavior of several 2,5-disubstituted 1,3,4-oxadiazin-6-ones with electron rich pi bonds has been carried out. trans-1-Propenylpyrrolidine was found to react with the oxadiazinone ring system to give rise to a ring opened diazatrienyl substituted carboxylic acid. Further heating of the acid results in decarboxylation, hydrolysis, cyclization and pyrrolidine elimination to produce a disubstituted pyrazole. Reaction with the trisubstituted enamine 1 - ( 2 - methyl-propenyl) pyrrolidine, was also studied in some detail. The cycloadditions encountered can be rationalized as proceeding by an initial Diels-Alder reaction followed by cheletropic extrusion of nitrogen to produce a ketoketene intermediate. The fate of the ketene is markedly dependent upon the overall pattern of substitution. Some of the products formed can be explained in terms of a competitive migration of the pyrrolidino group to the ketene and benzoyl groups. With one system the major cycloadduct is derived from the Diels-Alder reaction of a transient azaketene tautomer formed by an electrocyclic opening of the oxadiazinone ring.

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