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295312-00-4

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295312-00-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 295312-00-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,9,5,3,1 and 2 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 295312-00:
(8*2)+(7*9)+(6*5)+(5*3)+(4*1)+(3*2)+(2*0)+(1*0)=134
134 % 10 = 4
So 295312-00-4 is a valid CAS Registry Number.

295312-00-4Downstream Products

295312-00-4Relevant articles and documents

21,23-Dithia-3,13-diazaporphycenes - novel aromatic porphycene analogues incorporating thiazole

Nu?baumer, Thomas,Krieger, Claus,Neidlein, Richard

, p. 2449 - 2457 (2007/10/03)

The syntheses of the first examples of aromatic thiazole-containing porphycene analogues 3 have been accomplished by oxidation of the corresponding 3,20:10,13-diepithio-6,9:16,19-diimino-1,11-diaza[20]annulenes 9 with DDQ. Compounds 9a-c have been synthesized by McMurry coupling reaction of the diformylated 2-(1H-pyrrol-2-yl)thiazoles 8a-c, readily available by a three-step reaction sequence using 2-pyrrolethiocarboxamide (4) as starting material. The aromaticity of the 21,23-dithia-3,13-diazaporphycenes 3 is clearly established by NMR and UV/Vis spectroscopy and verified by X-ray crystal structure analysis of 3b.

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