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164031-41-8

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164031-41-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 164031-41-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,4,0,3 and 1 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 164031-41:
(8*1)+(7*6)+(6*4)+(5*0)+(4*3)+(3*1)+(2*4)+(1*1)=98
98 % 10 = 8
So 164031-41-8 is a valid CAS Registry Number.

164031-41-8Downstream Products

164031-41-8Relevant articles and documents

Flavonoids, 45 . A General and Efficient Synthesis of Hydroxyflavones and -chromones

Patonay, Tamas,Molnar, Denes,Muranyi, Zoltan

, p. 233 - 242 (2007/10/02)

An efficient and versatile method for the synthesis of flavones hydroxylated in either ring A or B and of chromones hydroxylated in is described.This approach is based on the acidic resin-promoted cyclodehydration and simultaneous deprotection of methoxymethoxylated 1-(2-hydroxyphenyl)propane-1,3-diones easily available by either the Baker-Venkataraman rearrangement or the Claisen condensation. - Key words: Amberlyst 15 / Baker-Venkataraman rearrangement / Claisen condensation / hydroxychromone / hydroxyflavone / methoxymethyl protection

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