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139706-23-3

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139706-23-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139706-23-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,0 and 6 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139706-23:
(8*1)+(7*3)+(6*9)+(5*7)+(4*0)+(3*6)+(2*2)+(1*3)=143
143 % 10 = 3
So 139706-23-3 is a valid CAS Registry Number.

139706-23-3Downstream Products

139706-23-3Relevant academic research and scientific papers

Asymmetric Oxidation of Simple Selenides to Selenoxides in High Enantiopurity. Stereochemical Aspects of the Allyl Selenoxide/Allyl Selenenate Rearrangement

Davis, Franklin A.,Reddy, R. Thimma

, p. 2599 - 2606 (2007/10/02)

For the first time simple alkyl aryl selenoxides of high enantiomeric purity (90-95percent ee) and well-defined stereochemistry are available via the asymmetric oxidation of selenides using (+)- or (-)-N-(phenylsulfonyl)-(3,3-dichlorocamphoryl)oxaziridine heptane-2,3'-oxaziridine>>>.These nonracemic selenoxides, which are more stable in solution than in the solid state, exhibit high configurational stability as long as acid and moisture are excluded.Complete racemization occurs within minutes on addition of trace amounts of acid and water.The asymmetric oxidation of (E)- and (Z)-aryl cinnamyl selenides 11 and 12 with oxaziridine (+)-4 affords optically active 1-phenyl allyl alcohol (15) via a concerted sigmatropic selenoxide-selenenate rearrangement.The extent of 1->3 chirality transfer (41-62percent ee) as well as the endo/exo transition state geometry is highly dependent on the structure of the allylic selenide.

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