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128950-90-3

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128950-90-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128950-90-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,5 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 128950-90:
(8*1)+(7*2)+(6*8)+(5*9)+(4*5)+(3*0)+(2*9)+(1*0)=153
153 % 10 = 3
So 128950-90-3 is a valid CAS Registry Number.

128950-90-3Relevant articles and documents

NOVEL CYCLOAROMATIZATION IN REFORMATSKY REACTION ON α-OXOKETENE DITHIOACETALS: A REGIOSELECTIVE SYNTHESIS OF SUBSTITUTED ETHYL 2-HYDROXY-6-METHYLTHIOBENZOATES

Datta, Apurba,Ila, Hiriyakkanavar,Junjappa, Hiriyakkanavar

, p. 497 - 500 (1988)

A novel cycloaromatization reaction leading to substituted ethyl 2-hydroxy-3-methyl-thiobenzoates 6 by condensation of α-oxoketene dithioacetals 1 with excess of Reformatsky reagent 2 from ethyl bromoacetate through intermediate dienes 3 has been reported.

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