Cas 99390-20-2,4-methyl-1,2,5-thiadiazole-3-carboxaldehyde p-toluenesulfonyl hydrazone

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Check Digit Verification of cas no

The CAS Registry Mumber 99390-20-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,3,9 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99390-20:
(7*9)+(6*9)+(5*3)+(4*9)+(3*0)+(2*2)+(1*0)=172
172 % 10 = 2
So 99390-20-2 is a valid CAS Registry Number.

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99390-20-2Relevant academic research and scientific papers

Preparation of 1,2,5-Thiadiazole-3-carboxaldehydes

Mataka, Shuntaro,Kurisu, Masayoshi,Takahashi, Kazufumi,Tashiro, Masashi

, p. 325 - 328 (2007/10/02)

1,2,5-Thiadiazole-3-carboxaldehydes 1a-c were prepared by the acid-catalyzed decomposition of 3-azidomethyl-1,2,5-thiadiazoles 2a-c in 68-83percent yields, respectively.Pyrolysis of 2a and 2b afforded the imidazoles 4a and 4b in low yields.NBS-bromination of 1a and 1b gave the corresponding carboxylic acids 10a and 10b via acid bromides 9.Azides 2a and 2b gave the s-triazines 8a and 8b on treatment with NBS.

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