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1431569-58-2

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1431569-58-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1431569-58-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,3,1,5,6 and 9 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1431569-58:
(9*1)+(8*4)+(7*3)+(6*1)+(5*5)+(4*6)+(3*9)+(2*5)+(1*8)=162
162 % 10 = 2
So 1431569-58-2 is a valid CAS Registry Number.

1431569-58-2Downstream Products

1431569-58-2Relevant articles and documents

FeCl3-diorganyl dichalcogenides promoted cyclization of 2-organochalcogen-3-alkynylthiophenes: Synthesis of chalcogenophene[2,3-b] thiophenes

Stein, Andre L.,Bilheri, Filipe N.,Rosario, Alisson R.,Zeni, Gilson

, p. 2972 - 2978 (2013/07/26)

We report here our results on the FeCl3-diorganyl dichalcogenides intramolecular cyclization of 2-organochalcogen-3- alkynylthiophenes. The cyclization reaction proceeded cleanly under mild reaction conditions giving the (S)-Se-, (S)-S- and (S)-Te-heterocycles in good yields. In addition, the obtained chalcogenophenes were readily transformed into more complex products using the palladium cross-coupling reaction with boronic acids. Conversely, using a metal-halogen exchange reaction with n-BuLi, the chalcogenophenes produced the lithium-intermediate which was trapped with aldehyde furnishing the desired secondary alcohol in good yield. The Royal Society of Chemistry 2013.

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