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402567-99-1

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402567-99-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 402567-99-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,2,5,6 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 402567-99:
(8*4)+(7*0)+(6*2)+(5*5)+(4*6)+(3*7)+(2*9)+(1*9)=141
141 % 10 = 1
So 402567-99-1 is a valid CAS Registry Number.

402567-99-1Downstream Products

402567-99-1Relevant articles and documents

Copper(I) bromide-mediated synthesis of novel 2-arylthiazole-5-carboxylates from α-diazo-β-keto esters and aromatic thioamides

Fontrodona,Diaz,Linden,Villalgordo

, p. 2021 - 2027 (2007/10/03)

Starting from readily available α-diazo-β-keto esters 8 and aromatic primary thioamides 9 and 14, a simple synthesis of 2-aryl 4-substituted thiazole-5-carboxylate derivatives of type 10 and 16 has been accomplished. The method is based on the efficient catalysis of CuBr, which promotes the formation of the corresponding carbenoids 11 from diazo derivatives 8. These Cu-carbenoids 11 react with the thiocarbonyl group of the primary thioamides to afford presumably intermediates of the general type 12, which by subsequent cyclocondensation furnish the title thiazole derivatives.

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