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31642-88-3

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31642-88-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 31642-88-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,6,4 and 2 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 31642-88:
(7*3)+(6*1)+(5*6)+(4*4)+(3*2)+(2*8)+(1*8)=103
103 % 10 = 3
So 31642-88-3 is a valid CAS Registry Number.

31642-88-3Relevant articles and documents

Predicting the diastereoselectivity of Rh-mediated intramolecular C-H insertion

Taber, Douglass F.,You, Kamfia K.,Rheingold, Arnold L.

, p. 547 - 556 (2007/10/03)

Rhodium-mediated cyclization of the α-diazo ester 1 proceeds with high diastereoselectivity, to give the trisubstituted cyclopentane 5. A computational model (ZINDO and Molecular Mechanics) based on our current mechanistic understanding of the reaction is presented. This model correctly predicts the dominant diastereomer from the cyclization of 1 and the eight (Table 2) other α-diazo esters studied thus far.

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