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172988-64-6

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172988-64-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 172988-64-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,9,8 and 8 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 172988-64:
(8*1)+(7*7)+(6*2)+(5*9)+(4*8)+(3*8)+(2*6)+(1*4)=186
186 % 10 = 6
So 172988-64-6 is a valid CAS Registry Number.

172988-64-6Relevant articles and documents

An Approach to Substituted 4-Hydroxypyran-2-ones

Ramirez, Mai-ly,Garey, Donna,Pena, Michael R.

, p. 1657 - 1660 (2007/10/03)

We examined a method for the preparation of 4-hydroxypyran-2-ones in two steps from aryl ketones and ethyl malonyl chloride (or ethyl 2-methylmalonyl chloride).These 4-hydroxypyran-2-ones are useful precursors as they may be transformed in two steps to the 2-methoxypyran-4-ones, which is found in phenoxan - a naturally occurring compound discovered to have anti-HIV activity.

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