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221114-35-8

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221114-35-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221114-35-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,1 and 4 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 221114-35:
(8*2)+(7*2)+(6*1)+(5*1)+(4*1)+(3*4)+(2*3)+(1*5)=68
68 % 10 = 8
So 221114-35-8 is a valid CAS Registry Number.

221114-35-8Downstream Products

221114-35-8Relevant articles and documents

Efficient synthesis of 3-methylene-2-pyrrolidinone and highly exoselective diels-alder addition to cyclopentadiene

Fotiadu, Frederic,Pardigon, Olivier,Buono, Gerard,Le Corre, Maurice,Hercouet, Alain

, p. 867 - 870 (2007/10/03)

A new efficient synthesis of 3-methylene 2-pyrrolidinone 1 involving ylide-lactame 6 is reported. Diels-Alder cycloadditions of 1 to cyclopentadiene exhibited very high exoselectvities, regardless Of the experimental conditions. These results confirm the generality of exoselectivity for conformationally restricted s-cis dienophiles and indicate that the dienophile functionality and dipole moment have little influence on its magnitude.

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