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156050-40-7

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156050-40-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156050-40-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,0,5 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 156050-40:
(8*1)+(7*5)+(6*6)+(5*0)+(4*5)+(3*0)+(2*4)+(1*0)=107
107 % 10 = 7
So 156050-40-7 is a valid CAS Registry Number.

156050-40-7Relevant articles and documents

Stereochemistry of direct olefin formation from carbonyl compounds and lithiated heterocyclic sulfones

Baudin, J. B.,Hareau, G.,Julia, S. A.,Lorne, R.,Ruel, O.

, p. 856 - 878 (2007/10/02)

The conditions for the title reaction were studied for the 2-benzothiazole and 2-pyridine series and for some examples in the 2-pyrimidine series.The olefin preparations were generally observed to be more efficient for 2-BT-sulfone systems.From the data of the hundred cases studied, it can be concluded that (E)-olefins are obtained: (i) from saturated BT-sulfones and aromatic aldehydes; and (ii) from benzylic BT-sulfones and branched saturated aldehydes (isobutyraldehyde, pivalaldehyde) or α,β-ethylenic or aromatic aldehydes. (Z)-olefins arise: (i) fom propargylic BT-sulfones and saturated or aromatic aldehydes; and (ii) from allylic or benzylic Pyr-sulfones and saturated aldehydes.Possible mechanisms for this new olefination procedure were examined. - heteroaromatic sulfones, organolithium derivatives, intramolecular ipso reactions, stereochemistry, elimination, olefination.

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