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138638-64-9

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138638-64-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138638-64-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,6,3 and 8 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 138638-64:
(8*1)+(7*3)+(6*8)+(5*6)+(4*3)+(3*8)+(2*6)+(1*4)=159
159 % 10 = 9
So 138638-64-9 is a valid CAS Registry Number.

138638-64-9Relevant articles and documents

Ulose formation by selenoxide elimination

Heath, Christine E.,Gillam, Maria C.,Callis, Carrie S.,Patto, Robert R.,Abelt, Christopher J.

, p. 371 - 373 (1998)

Ring opening of methyl 2,3-anhydro-(R)-4,6-O-benzylidene-α-D- mannopyranoside with phenyl selenide gives (R)-4,6-O-benzylidene-3-Se- phenyl-3-seleno-α-D-altropyranoside (2). Oxidation of (2) with H2O2 followed by thermolysis gives methyl (R)-4,6-O-benzylidene-3-deoxy-α-D- erythrohexopyranosid-2-ulose via syn-elimination and ketoenol tautomerization.

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