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1233921-25-9

1233921-25-9

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1233921-25-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1233921-25-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,3,9,2 and 1 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1233921-25:
(9*1)+(8*2)+(7*3)+(6*3)+(5*9)+(4*2)+(3*1)+(2*2)+(1*5)=129
129 % 10 = 9
So 1233921-25-9 is a valid CAS Registry Number.

1233921-25-9Downstream Products

1233921-25-9Relevant articles and documents

Efficient synthesis of 5-nitro-benzo[b]furans via 2-bromo-4-nitro-phenyl acetates

Bochicchio, Antonella,Chiummiento, Lucia,Funicello, Maria,Lopardo, Maria Teresa,Lupattelli, Paolo

, p. 2824 - 2827 (2010)

Acetylation/Sonogashira cross-coupling reaction/cyclization has been carried out in one-pot using a Na2PdCl4/2-(di-tert-butylphosphino)-N-phenylindole/CuI system in TMEDA to give 5-nitro-2-substituted benzo[b]furans in excellent yields. We also describe the extension of this method to 4-EWG-2-bromo-phenols obtaining 2,5-disubstituted-benzo[b]furans in good yields.

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