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5658-51-5

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5658-51-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5658-51-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,5 and 8 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5658-51:
(6*5)+(5*6)+(4*5)+(3*8)+(2*5)+(1*1)=115
115 % 10 = 5
So 5658-51-5 is a valid CAS Registry Number.

5658-51-5Relevant articles and documents

A New Synthesis of 1-n-Alkyl-3,5-dimethoxybenzenes (Olivetol Dimethyl Ether and Homologs)

Azzena, Ugo,Denurra, Teresa,Fenude, Emma,Melloni, Giovanni,Rassu, Gloria

, p. 28 - 30 (2007/10/02)

An efficient method is reported for the synthesis of 1-n-alkyl-3,5-dimethoxybenzenes, useful intermediates in the synthesis of cannabinoids, from the readily available and cheap 3,4,5-trimethoxybenzoic acid.The key step is the electron-transfer induced highly regioselective demethoxylation of 1-n-alkyl-3,4,5-trimethoxybenzenes.

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