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1345857-81-9

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1345857-81-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1345857-81-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,4,5,8,5 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1345857-81:
(9*1)+(8*3)+(7*4)+(6*5)+(5*8)+(4*5)+(3*7)+(2*8)+(1*1)=189
189 % 10 = 9
So 1345857-81-9 is a valid CAS Registry Number.

1345857-81-9Downstream Products

1345857-81-9Relevant articles and documents

Synthesis of unsymmetrically substituted pyrene derivatives through (6-bromo-3,8-dibutylpyren-1-yl)trimethylsilane

Sato, Akihiro H.,Maeda, Mine,Mihara, Shigenori,Iwasawa, Tetsuo

, p. 6284 - 6287 (2011/12/14)

A straightforward route to unsymmetrically functionalized pyrene derivatives is described involving the synthesis of key precursor (6-bromo-3,8-dibutylpyren-1-yl)trimethylsilane 1. In a first step bromide 1 was successful in Suzuki-Miyaura, Sonogashira, and Buchwald-Hartwig cross-coupling reactions. Subsequent transformation of the trimethylsilyl group to bromide enabled the introduction of a second variable functional group onto the pyrene skeleton.

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