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133706-55-5

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133706-55-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133706-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,7,0 and 6 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 133706-55:
(8*1)+(7*3)+(6*3)+(5*7)+(4*0)+(3*6)+(2*5)+(1*5)=115
115 % 10 = 5
So 133706-55-5 is a valid CAS Registry Number.

133706-55-5Downstream Products

133706-55-5Relevant articles and documents

Synthesis and Stereochemistry of Optically Active Selenonium Imides

Kamigata, Nobumasa,Taka, Hideo,Matsuhisa, Ayumi,Matsuyama, Haruo,Shimizu, Toshio

, p. 2257 - 2264 (2007/10/02)

Diastereomeric mixtures of 4-phenyl(methyl)selenonium-N-toluene-4'-sulfonimides (dia.-1) amd 4-phenyl(2',4',6'-triisopropylphenyl)selenonium-N-toluene-4''-sulfonimides (dia.-7) were synthesized.Optical resolution by the fractional recrystallization of dia.-7 from methanol gave the optically pure (-)-selenonium imide as stable crystals.The absolute configuration around the selenium atom was determined to be S based on the CD spectra.The kinetics for the epimerization by pyramidal inversion of the optically active selenonium imide were studied.

Synthesis of Optically Active Selenonium Ylide

Kamigata, Nobumasa,Nakamura, Yoshihiro,Matsuyama, Haruo,Shimizu, Toshio

, p. 249 - 250 (2007/10/02)

Fractional recrystallization of diastereomeric methylselenonium 4,4-dimethyl-2,6-dioxocyclohexylide from hexane-ether gave optically pure (+)-selenonium ylide as a stable crystal.

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