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16766-31-7

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16766-31-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16766-31-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,7,6 and 6 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 16766-31:
(7*1)+(6*6)+(5*7)+(4*6)+(3*6)+(2*3)+(1*1)=127
127 % 10 = 7
So 16766-31-7 is a valid CAS Registry Number.
InChI:InChI=1/C7H6Cl2O2/c1-11-6-3-4(8)2-5(9)7(6)10/h2-3,10H,1H3

16766-31-7Relevant articles and documents

Unanticipated participation of HCl in nucleophilic chlorination reaction: Expedient route to meta chlorophenols

Chittimalla, Santhosh Kumar,Bandi, Chennakesavulu

supporting information, p. 15 - 19 (2015/12/23)

o-Quinone monoketals participated in a 1,4-addition reaction with HCl furnishing m-chlorophenols in high yields. Several readily available o-quinone monoketals were selected to display the generality of this serendipitous and unprecedented reaction and the results are presented herein.

Crown Ethers from o-Quinone Diazides and Oxetane

Kirmse, Wolfgang,Lelgemann, Rudolf

, p. 1865 - 1866 (2007/10/02)

The carbenes 11, generated by photolysis of the di- and tetrachloro-o-quinone diazides 10, react with oxetane in a 1:3 ratio to give the 15-membered crown ethers 19.In the presence of methanol, the oxonium ions 12 are trapped with formation of 1-(aryloxy)-3-methoxypropanes (13).In the absence of additional nucleophiles, 12 react with oxetane until the chain length is appropriate for inverting intramolecular attack of the aryl oxide at the α-carbon atom of the oxonium ion (18 -> 19). Key Words: Carbonyl carbenes/ Oxygen ylides/ Displacement, nucleophilic, intramolecular/ Carbenes/ Ylides

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