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191475-21-5

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191475-21-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191475-21-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,4,7 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 191475-21:
(8*1)+(7*9)+(6*1)+(5*4)+(4*7)+(3*5)+(2*2)+(1*1)=145
145 % 10 = 5
So 191475-21-5 is a valid CAS Registry Number.

191475-21-5Upstream product

191475-21-5Relevant articles and documents

1,13 and 1,14 asymmetric induction: Remote control

Magnus, Nicholas,Magnus, Philip

, p. 3491 - 3494 (2007/10/03)

Treatment of the acyclic sulfones 6 (n = 1, 2, 3 and 4) with n-BuLI/THF/-100°C followed by PhCHO gave only two diastereomeric β-hydroxysulfones 7. The selection of two out of a possible four diastereomers is observed even though the chiral inducing entity is 10, 11, 12 and 13 atoms from the reaction locus. These results represent the illustration of long range asymmetric induction (LAI) controlled by supramolecular interactions.

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