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140464-71-7

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140464-71-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 140464-71-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,4,6 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 140464-71:
(8*1)+(7*4)+(6*0)+(5*4)+(4*6)+(3*4)+(2*7)+(1*1)=107
107 % 10 = 7
So 140464-71-7 is a valid CAS Registry Number.

140464-71-7Downstream Products

140464-71-7Relevant articles and documents

Regioselective Reductive Electrophilic Substitution of Derivatives of 3,4,5-Trimethoxybenzaldehyde

Azzena, Ugo,Melloni, Giovanni,Piroddi, Anna Maria,Azara, Emanuela,Contini, Stefania,Fenude, Emma

, p. 3101 - 3106 (2007/10/02)

The behavior of several protected derivatives of 3,4,5-trimethoxybenzaldehyde has been investigated under conditions of electron transfer from alkali metals in aprotic solvents.The 4-methoxy group can be regioselectively removed in good to high yield under such conditions, and an appropriate choice of the protecting group, metal, and solvent allows its substitution with a variety of electrophiles. 3,4,5-Trimethoxybenzaldehyde dimethyl acetal, 1, is the starting material of choice for a new general synthetic approach to several polysubstituted resorcinol dimethyl ethers.Investigation of the mechanism of demethoxymetylation, with the aid of labeling experiments, showed that reductive demethoxylation is strongly influenced by the nature of the aldehyde protective group employed.

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