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38552-83-9

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38552-83-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 38552-83-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,5,5 and 2 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 38552-83:
(7*3)+(6*8)+(5*5)+(4*5)+(3*2)+(2*8)+(1*3)=139
139 % 10 = 9
So 38552-83-9 is a valid CAS Registry Number.

38552-83-9Relevant articles and documents

Cyclization of (2-alkenylphenyl)carbonyl compounds to polycyclic arenes catalyzed by copper(II) trifluoromethanesulfonate or trifluoromethanesulfuric acid

Liu, Wei-Min,Tnay, Ya Lin,Gan, Kian Ping,Liu, Zhen-Hong,Tyan, Wan Huei,Narasaka, Koichi

, p. 1953 - 1969,17 (2012/12/12)

Various polycyclic arenes, such as naphthalenes, tetrahydroantharacenes, tetrahydrotetracenes, dihydropentacenes, and dihydropentaphenes are prepared from 2-alkenylphenyl ketones and aldehydes by the catalytic use of copper(II) trifluoromethanesulfonate (Cu(OTf)2) or trifluoromethanesulfuric acid (TfOH). Copyright

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