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81171-54-2

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81171-54-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81171-54-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,7 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81171-54:
(7*8)+(6*1)+(5*1)+(4*7)+(3*1)+(2*5)+(1*4)=112
112 % 10 = 2
So 81171-54-2 is a valid CAS Registry Number.

81171-54-2Relevant articles and documents

ETUDE DE LA REACTION CHLOROCARBENE-ACETALS DE CETENES. I. SYNTHESE D'ESTERS α,β-ETHYLENIQUES.

Slougui, N.,Rousseau, G.

, p. 2643 - 2652 (2007/10/02)

The reaction of chloro, chloromethyl and chlorophenyl carbenoids with ketene alkylsilylacetals has been studied.Excellent yields of cyclopropanation were observed and the unstable chlorocyclopropanone acetals formed were thermally rearranged in high yield into α-substituted α,β-ethylenic esters.This new method for the synthesis of unsaturated esters appeared complementary of the known-ones.

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