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149742-73-4

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149742-73-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 149742-73-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,9,7,4 and 2 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 149742-73:
(8*1)+(7*4)+(6*9)+(5*7)+(4*4)+(3*2)+(2*7)+(1*3)=164
164 % 10 = 4
So 149742-73-4 is a valid CAS Registry Number.

149742-73-4Downstream Products

149742-73-4Relevant articles and documents

Synthesis of 2-R-4,6-dinitro-2h-indazoles from 2,4,6-trinitrotoluene

Kuvshinov,Gulevskaya,Rozhkov,Shevelev

, p. 1474 - 1478 (2000)

An efficient synthesis of 2-R-4,6-dinitro-2H-indazoles (R = aryl or substituted amine) from 2,4,6-trinitrotoluene was elaborated. The proposed method includes formation of C-(2,4,6-trinitrophenyl)-N-R-azomethines 1 (a-g) from TNT or the product of its transformation 2,4,6-trinitrobenzaldehyde (TNBA) with the further regiospecific substitution of the ortho-nitro group in 1 (a-g) by the azido group under the action of NAN3. Thermolysis of the azides 2 (a-g) gives previously unknown 2-R-4,6-dinitro-2H-indazoles 3 (a-g) in high yields.

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