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40940-77-0

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40940-77-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40940-77-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,9,4 and 0 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 40940-77:
(7*4)+(6*0)+(5*9)+(4*4)+(3*0)+(2*7)+(1*7)=110
110 % 10 = 0
So 40940-77-0 is a valid CAS Registry Number.

40940-77-0Relevant articles and documents

Convenient synthesis of triarylmethanes and 9,10-diarylanthracenes by alkylation of arenes with aromatic aldehydes using acetyl bromide and ZnBr2/SiO2

Kodomari, Mitsuo,Nagamatsu, Maki,Akaike, Megumi,Aoyama, Tadashi

, p. 2537 - 2540 (2008/09/21)

Reaction of electron-rich arenes with acetyl bromide and aldehydes in the presence of silica gel-supported zinc bromide was carried out in benzene to give selectively the corresponding triarylmethanes or 9,10-diarylanthracenes in high yields depending upon the ratio of an arene and an aldehyde. The mild conditions employed are especially noteworthy.

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