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4749-70-6

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4749-70-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4749-70-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,7,4 and 9 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 4749-70:
(6*4)+(5*7)+(4*4)+(3*9)+(2*7)+(1*0)=116
116 % 10 = 6
So 4749-70-6 is a valid CAS Registry Number.

4749-70-6Relevant articles and documents

Stereoselective Formation of Maleic Acid Diester from Two Diazo Acetic Acid Esters on a Raney Nickel Surface. Evidence for Dipod-chemisorbed Carbenes

Bock, Hans,Wolf, Hans Peter

, p. 690 - 692 (1990)

The N2 elimination from diazo acetic acid esters, heterogeneously catalysed by Raney Nickel, yields as chemidesorbed main product up to 93percent maleic acid diester, cis-stereoselectivity is observed and additional methyl/ethyl ester crossing experiments provide evidence for dipod-chemisorbed surface carbene intermediates.

Cyclopropanation Catalysed by RuCl2(PPh3)3 and OsCl2(PPh3)3

Demonceau, A.,Lemoine, C. A.,Noels, A. F.,Chizhevsky, I. T.,Sorokin, P.V.

, p. 8419 - 8422 (2007/10/02)

OsCl2(PPh3)3 is a cyclopropanation catalyst using ethyl diazoacetate with a variety of activated alkenes; OsCl2(PPh3)3 is however less active than RuCl2(PPh3)3 for the decomposition of the diazo reagent and the subsequent cyclopropanation.

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