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13756-19-9

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13756-19-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13756-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,7,5 and 6 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 13756-19:
(7*1)+(6*3)+(5*7)+(4*5)+(3*6)+(2*1)+(1*9)=109
109 % 10 = 9
So 13756-19-9 is a valid CAS Registry Number.

13756-19-9Relevant articles and documents

Efficient and regioselective ring-opening of epoxides with carboxylic acid catalyzed by graphite oxide

Mirza-Aghayan, Maryam,Tavana, Mahdieh Molaee,Niazi, Elaheh Golam Alipour,Boukherroub, Rabah

, p. 532 - 538 (2020/07/17)

An efficient, simple and regioselective ring-opening reaction of epoxides with various carboxylic acids under metal-free conditions is reported. The ring-opening of epoxides takes place in the presence of graphite oxide as an efficient and available catalyst to produce the corresponding 2-hydroxy monoester and 1,2-diester derivatives in good yields. Regioselective attack of the nucleo-phile, short reaction times, metal-free conditions and reusability of catalyst are among the advantages of the present protocol.

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