Cas 221558-33-4,5-azido-2-phenyl-4(N-phenyliminomethyl)thiazole

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Check Digit Verification of cas no

The CAS Registry Mumber 221558-33-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,5,5 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221558-33:
(8*2)+(7*2)+(6*1)+(5*5)+(4*5)+(3*8)+(2*3)+(1*3)=114
114 % 10 = 4
So 221558-33-4 is a valid CAS Registry Number.

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221558-33-4Relevant academic research and scientific papers

A novel ring transformation of 5-azidothiazoles

Ceulemans, Erik,Dyall, Leonard K.,Dehaen, Wim

, p. 1977 - 1988 (2007/10/03)

The 4-oxoalkyl- and 4-iminoalkyl-5-azidothiazoles undergo a ring transformation with nitrogen loss at relatively low temperatures to afford 4- cyanooxazoles and 4-cyanoimidazoles, respectively. The mechanism, which is thought to involve a ring opening-ring closure process, is discussed.

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