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4764-20-9

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4764-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4764-20-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,7,6 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4764-20:
(6*4)+(5*7)+(4*6)+(3*4)+(2*2)+(1*0)=99
99 % 10 = 9
So 4764-20-9 is a valid CAS Registry Number.

4764-20-9Relevant articles and documents

Synthesis method of phthalimide and phenyl ring-substituted phthalimide derivative

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Paragraph 0013; 0017; 0018; 0020; 0023; 0028, (2017/08/25)

The invention provides a synthesis method of phthalimide and a phenyl ring-substituted phthalimide derivative. The synthesis method comprises that aromatic ketone and ammonia gas or an ammonia gas precursor as substrates and air or oxygen as an oxygen source undergo a reaction under catalyst action and liquid phase conditions to produce phthalimide and a phenyl ring-substituted phthalimide derivative. The synthesis method is mild, realizes high oxidation efficiency and a high product yield, utilizes oxygen or air as an oxygen source, is economic and eco-friendly and has a good application prospect.

A PREFERRED METHOD FOR IMIDE PREPARATION

Crockett, Geoffrey C.,Swanson, Barry J.,Anderson, David R.,Koch, Tad H.

, p. 447 - 454 (2007/10/02)

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