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219983-80-9

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219983-80-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219983-80-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,8 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 219983-80:
(8*2)+(7*1)+(6*9)+(5*9)+(4*8)+(3*3)+(2*8)+(1*0)=179
179 % 10 = 9
So 219983-80-9 is a valid CAS Registry Number.

219983-80-9Relevant articles and documents

Photooxygenation of chiral dienol ethers: Asymmetric synthesis of alkoxydioxines

Dussault, Patrick H.,Han, Qiang,Sloss, Darby G.,Symonsbergen, David J.

, p. 11437 - 11454 (2007/10/03)

The addition of 1O2 to chiral dienol ethers provides a new route to alkoxydioxines (alkoxyendoperoxides). Depending upon substitution and geometry, the [4+2] cycloaddition is accompanied or even supplanted by [2+2] cycloaddition leading to alkene cleavage and/or ene-like reaction leading to allylic hydroperoxides. The diastereoselectivity of cycloaddition is ultimately limited by the conformational freedom of the dienol ether substrates.

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