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1240042-04-9

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1240042-04-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1240042-04-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,0,4 and 2 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1240042-04:
(9*1)+(8*2)+(7*4)+(6*0)+(5*0)+(4*4)+(3*2)+(2*0)+(1*4)=79
79 % 10 = 9
So 1240042-04-9 is a valid CAS Registry Number.

1240042-04-9Downstream Products

1240042-04-9Relevant articles and documents

Straightforward synthesis of ethers: Metal-free reductive coupling of tosylhydrazones with alcohols or Phenols

Barluenga, Jose,Tomas-Gamasa, Maria,Aznar, Fernando,Valde, Carlos

, p. 4993 - 4996 (2010)

(Figure Presented) Ethers made easy: Heating a solution containing a tosylhydrazone and either a phenol or an alcohol in the presence of K 2CO3 leads to the corresponding ethers (see scheme; MW=microwave, Ts=tosyl). The reaction is fairly general for the preparation of aryl alkyl and alkyl alkyl ethers, and represents a new method for the reductive etherification of carbonyl compounds.

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