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1240787-82-9

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1240787-82-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1240787-82-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,7,8 and 7 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1240787-82:
(9*1)+(8*2)+(7*4)+(6*0)+(5*7)+(4*8)+(3*7)+(2*8)+(1*2)=159
159 % 10 = 9
So 1240787-82-9 is a valid CAS Registry Number.

1240787-82-9Downstream Products

1240787-82-9Relevant academic research and scientific papers

Synthesis of new 2,5-dimethyl pyrrole derivatives from acetonylacetone

Ji, Xiao Ming,Lu, Ye,Zhao, Ming Qin,Zhang, Xiao Yun,Liu, Yun,Liu, Le

, p. 919 - 921 (2010)

Acetonylacetone 1 was treated with thiourea, aniline, glycin and glutamic acid to give pyrrole derivatives 2, 3, 5, and 9 by Paal-Knorr reaction, respectively. Then 3 was successfully transformed into the related pyrrole derivative 4 by Mannich reaction. Compounds 6, 7 and 8 were obtained by reacting 5 with phenethyl alcohol, phenylallylic alcohol and leaf alcohol by esterification reactions, respectively. The structures of all new products were elucidated by IR, NMR and HRMS spectra.

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