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1639453-20-5

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1639453-20-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1639453-20-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,9,4,5 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1639453-20:
(9*1)+(8*6)+(7*3)+(6*9)+(5*4)+(4*5)+(3*3)+(2*2)+(1*0)=185
185 % 10 = 5
So 1639453-20-5 is a valid CAS Registry Number.

1639453-20-5Downstream Products

1639453-20-5Relevant articles and documents

Synthesis, characterization, and reactivity of novel 6H-1,3,5-oxathiazine S,S-dioxides

Islam, Md. Rafiqul,Takikawa, Yuji,Lim, Kwon Taek

, p. 604 - 609 (2014)

A series of novel 6H-1,3,5-oxathiazine S,S-dioxides were synthesized by the m-CPBA oxidation (2.2 equiv) of 6H-1,3,5-oxathizines. The synthetic utilities of the newly synthesized cyclic sulfones were investigated. In a thermal condition, compounds 6H-1,3,5-oxathiazine S,S-dioxides were found relatively stable, but Lewis acid-induced thermal reaction afforded the corresponding amides. The plausible pathway to amides from 6H-1,3,5-oxathiazine S,S-dioxides was also discussed in this account.

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