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1152493-20-3

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1152493-20-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1152493-20-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,5,2,4,9 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1152493-20:
(9*1)+(8*1)+(7*5)+(6*2)+(5*4)+(4*9)+(3*3)+(2*2)+(1*0)=133
133 % 10 = 3
So 1152493-20-3 is a valid CAS Registry Number.

1152493-20-3Downstream Products

1152493-20-3Relevant articles and documents

Copper-catalyzed synthesis of benzoxazoles via a regioselective C-H functionalization/C-O bond formation under an air atmosphere

Ueda, Satoshi,Nagasawa, Hideko

supporting information; experimental part, p. 4272 - 4277 (2009/09/08)

(Chemical Equation Presented) An efficient method for the synthesis of functionalized benzoxazoles is described that involves a copper(II)-catalyzed regioselective C-H functionalization/C-O bond formation protocol. The use of dichlorobenzene as a solvent at 160°C allows the use of air as the terminal oxidant in the catalytic synthesis of benzoxazoles in a process that has high functional group tolerance. The presence of a directing group at the meta position markedly improves the reaction efficacy and a variety of 7-substituted benzoxazoles are selectively produced under mild reaction conditions. The mechanism of the reaction is also discussed in this report.

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