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139697-55-5

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139697-55-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139697-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,6,9 and 7 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 139697-55:
(8*1)+(7*3)+(6*9)+(5*6)+(4*9)+(3*7)+(2*5)+(1*5)=185
185 % 10 = 5
So 139697-55-5 is a valid CAS Registry Number.

139697-55-5Downstream Products

139697-55-5Relevant articles and documents

Lewis Acid Catalysed Michael-type Addition. A New Regio- and Diastereoselective Annulation Method using Methyl Vinyl Ketone

Duhamel, Pierre,Dujardin, Gilles,Hennequin, Laurent,Poirier, Jean-Marie

, p. 387 - 396 (2007/10/02)

A new annulation method is presented, involving a boron trifluoride catalysed Michael addition of trialkylsilyl enol ethers to methyl vinyl ketone (MVK) in the presence of a hydroxylic compound.This methodology allows regiospecific 3-oxobutylation of eith

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