193544-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 193544-57-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,5,4 and 4 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 193544-57:
(8*1)+(7*9)+(6*3)+(5*5)+(4*4)+(3*4)+(2*5)+(1*7)=159
159 % 10 = 9
So 193544-57-9 is a valid CAS Registry Number.
193544-57-9Relevant articles and documents
Asymmetric Synthesis of Mellein Methyl Ether: Use of ortho-Toluate Carbanions Generated by Chiral Bases
Regan, Andrew C.,Staunton, James
, p. 764 - 765 (2007/10/02)
An ortho-toluate carbanion generated from (2) by the chiral lithium amide base (6), (7), or (11) undergoes an enantioselective aldol-type reaction with acetaldehyde to give mellein methyl ether (3), in up to 53 percent enantiomeric excess.
