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184176-33-8

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184176-33-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 184176-33-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,4,1,7 and 6 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 184176-33:
(8*1)+(7*8)+(6*4)+(5*1)+(4*7)+(3*6)+(2*3)+(1*3)=148
148 % 10 = 8
So 184176-33-8 is a valid CAS Registry Number.

184176-33-8Relevant articles and documents

Regiospecific synthesis of benzo[b]fluorenones via ring contraction by benzil-benzilic acid rearrangement of benz[a]anthracene-5,6-diones

Patra, Asit,Ghorai, Sujit K.,De, Saroj R.,Mal, Dipakranjan

, p. 2556 - 2562 (2008/02/04)

A regiospecific route to benzo[b]fluorenones is described. The synthesis is based upon a one-pot, regiospecific benzannulation of 1,4-dipolar synthons with naphthoquinone monoketal and ring contraction of the generated benz[a]anthracene-5,6-diones through benzil-benzilic acid rearrangement. Georg Thieme Verlag Stuttgart.

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