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1234578-08-5

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1234578-08-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1234578-08-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,4,5,7 and 8 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1234578-08:
(9*1)+(8*2)+(7*3)+(6*4)+(5*5)+(4*7)+(3*8)+(2*0)+(1*8)=155
155 % 10 = 5
So 1234578-08-5 is a valid CAS Registry Number.

1234578-08-5Downstream Products

1234578-08-5Relevant articles and documents

An improved practical Pd/C-catalyzed Sonogashira cross-coupling reaction for the synthesis of liquid crystals of trans-cyclohexyltolans

Shang, Hongyong,Hua, Ruimao,Zhenga, Qingwei,Zhangb, Jianli,Liang, Xiao,Zhu, Qiming

, p. 473 - 476 (2010)

An improved practical synthesis of liquid crystals of trans- cyclohexyltolans by Sonogashira cross-coupling reaction of 1-iodo- 4-(trans-4-alkylcyclohexyl)benzene with aromatic terminal alkynes in the presence of Pd/C (palladium on activated carbon) as low as 0.03mol% of Pd and CuI (2mol%) in amixture solvent of acetone-water (5 : 2 in volume) is described. The liquid crystals could be obtained in high yields as a solid with excellent purity by simple filtration, and the filtrate could be reused several times while still retaining high catalytic activity. Copyright

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