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117902-42-8

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117902-42-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117902-42-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,9,0 and 2 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 117902-42:
(8*1)+(7*1)+(6*7)+(5*9)+(4*0)+(3*2)+(2*4)+(1*2)=118
118 % 10 = 8
So 117902-42-8 is a valid CAS Registry Number.

117902-42-8Relevant articles and documents

On the crossed-aldol reaction of cyclohexane-1,2-dione with acetone, and the preparation of pyrroline derivatives from the product

Strunz, George M.,Yu, Chao-Mei

, p. 1081 - 1083 (2007/10/02)

Acetone reacts with cyclohexane-1,2-dione, on refluxing in the presence of potassium carbonate, to give the crossed-aldol product, 2-hydroxy-2-acetonylcyclohexanone, 2 (R = CH3).Other methyl ketones react similarly with cyclohexane-1,2-dione.This is believed to be a consequence of unfavourable dipole interaction in the 1,2-dione.The product, on reaction with liquid ammonia, afforded the 5-amino-4-hydroxy-1-pyrroline derivative, 5, which was reduced with lithium aluminium hydride to the 3-hydroxy-1-pyrroline, 7.

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