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21309-20-6

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21309-20-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21309-20-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,3,0 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 21309-20:
(7*2)+(6*1)+(5*3)+(4*0)+(3*9)+(2*2)+(1*0)=66
66 % 10 = 6
So 21309-20-6 is a valid CAS Registry Number.

21309-20-6Downstream Products

21309-20-6Relevant articles and documents

Solid sodium hydroxide - THF, convenient system for synthesis esters of glycidic acids by darzens condensation

Gadaj,Kowalkowska,Jonczyk

, p. 577 - 584 (2008/09/19)

Isopropyl- and tert-butylchloroacetate react with carbonyl compounds in the presence of powdered sodium hydroxide in THF, without a catalyst, giving substituted glycidates. The process is applied for preparation of glycidates from ketones, hitherto unavailable by phase-transfer catalyzed Darzens condensation.

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