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634193-92-3

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634193-92-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 634193-92-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,4,1,9 and 3 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 634193-92:
(8*6)+(7*3)+(6*4)+(5*1)+(4*9)+(3*3)+(2*9)+(1*2)=163
163 % 10 = 3
So 634193-92-3 is a valid CAS Registry Number.

634193-92-3Relevant articles and documents

Enantioselective hydrogen atom transfer to α-sulfonyl radicals controlled by selective coordination of a chiral Lewis acid to an enantiotopic sulfonyl oxygen

Sugimoto, Hideki,Nakamura, Shuichi,Watanabe, Yoshihiko,Toru, Takeshi

, p. 3043 - 3055 (2007/10/03)

Enantioselective hydrogen atom transfer to α-sulfonyl radicals generated from the alkyl radical addition to 2-propenyl and 1-phenylethenyl sulfones in the presence of chiral Lewis acids affords products with high enantioselectivity. The stereochemical course is discussed with the transition states involving selective coordination of a chiral Lewis acid to an enantiotopic sulfonyl oxygen.

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