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139223-54-4

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139223-54-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139223-54-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,2 and 3 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 139223-54:
(8*1)+(7*3)+(6*9)+(5*2)+(4*2)+(3*3)+(2*5)+(1*4)=124
124 % 10 = 4
So 139223-54-4 is a valid CAS Registry Number.

139223-54-4Downstream Products

139223-54-4Relevant articles and documents

Recoverable Chiral Sulfoxides for Asymmetric Synthesis: Preparation, Regeneration and Application to the Asymmetric Aldol Reaction

Butlin, Roger J.,Linney, Ian D.,Critcher, Douglas J.,Mahon, Mary F.,Molloy, Kieran C.,Wills, Martin

, p. 1581 - 1590 (2007/10/02)

The synthesis of a novel source of chiral sulfoxide and its application to the control of asymmetric aldol reactions is described.The sulfoxide precursor S(S)R-(+)-cis-4 may be recycled and thus affords a considerable advantage over currently a

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