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857028-40-1

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857028-40-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857028-40-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,0,2 and 8 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 857028-40:
(8*8)+(7*5)+(6*7)+(5*0)+(4*2)+(3*8)+(2*4)+(1*0)=181
181 % 10 = 1
So 857028-40-1 is a valid CAS Registry Number.

857028-40-1Downstream Products

857028-40-1Relevant academic research and scientific papers

The rapid preparation of 2-aminosulfonamide-1,3,4-oxadiazoles using polymer-supported reagents and microwave heating

Baxendale, Ian R.,Ley, Steven V.,Martinelli, Marisa

, p. 5323 - 5349 (2005)

Herein, we report on the preparation of a library of 5-substituted-2-amino- 1,3,4-oxadiazoles and the corresponding thiadiazole analogues. Presented is a one-pot preparation of the 2-aminosulfonylated analogues through a three component coupling of an acylhydrazine, an isocyanate and sulfonyl chloride promoted by a polymer-supported phosphazine base under microwave dielectric heating. Also described is the optimization process and details pertaining to the elucidation of the reaction products.

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