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158148-87-9

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158148-87-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158148-87-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,1,4 and 8 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 158148-87:
(8*1)+(7*5)+(6*8)+(5*1)+(4*4)+(3*8)+(2*8)+(1*7)=159
159 % 10 = 9
So 158148-87-9 is a valid CAS Registry Number.

158148-87-9Relevant articles and documents

Synthesis of naturally occurring 7,8,4'-Trihydroxy-6-methoxyisoflavone

Jain, Amolak C.,Singh, Prem K.,Bhojak, Narendar

, p. 372 - 374 (2007/10/02)

The title isoflavone (6) has been synthesised from 3,4-dibenzyloxy-2-hydroxyacetophenone (1) by the following steps: persulphate oxidation to 2, partial methylation to 3, its condensation with p-benzyloxybenzaldehyde (4) to chalcone 5, oxidation with thallium(III) nitrate in methanol and subsequent treatment with hydrochloric acid.Its identity has been determined by comparison of its characterization data (melting point, TLC, UV and acetate formation) with those of the natural compound.

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