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80639-18-5

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80639-18-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 80639-18-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,6,3 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 80639-18:
(7*8)+(6*0)+(5*6)+(4*3)+(3*9)+(2*1)+(1*8)=135
135 % 10 = 5
So 80639-18-5 is a valid CAS Registry Number.

80639-18-5Relevant articles and documents

Sequential catalytic isomerization and allylic substitution. Conversion of racemic branched allylic carbonates to enantioenriched allylic substitution products

Shekhar, Shashank,Trantow, Brian,Leitner, Andreas,Hartwig, John F.

, p. 11770 - 11771 (2007/10/03)

A catalytic protocol for the conversion of readily accessible racemic, branched aromatic allylic esters to branched allylic amines, ethers, and alkyls has been developed. Palladium-catalyzed isomerization of branched allylic esters to terminal allylic esters, followed by sequential iridium-catalyzed allylic substitution, gave the branched allylic products in good yield with high regioisomeric and enantiomeric selectivity. Both electron-rich and electron-poor branched allylic esters gave products in >90% ee. High enantiomeric excesses were also observed for the products from the reactions of 2-thienyl acetates and dienyl carbonates. Copyright

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