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51747-44-5

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51747-44-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 51747-44-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,7,4 and 7 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 51747-44:
(7*5)+(6*1)+(5*7)+(4*4)+(3*7)+(2*4)+(1*4)=125
125 % 10 = 5
So 51747-44-5 is a valid CAS Registry Number.

51747-44-5Relevant articles and documents

Intramolecular Carbenoid Reactions of Pyrrole Derivatives. A Total Synthesis of (+/-)-Ipalbidine

Jefford, Charles W.,Kubota, Tadatoshi,Zaslona, Alexander

, p. 2048 - 2061 (2007/10/02)

A mew method for alkaloid synthesis is described.The rhodium(II)-acetate-catalyzed decomposition of 3-(4-acetoxyphenyl)-1-diazo-4-(pyrrol-1-yl)-2-butanone (5d) gave 6-(4-acetoxyphenyl)-5,6-dihydro-7(8H)-indolizinone (6d) in 82percent yield via an intramolecular carbenoid reaction.The latter compound was converted in four steps in 13percent overall yield to (+/-)-ipalbidine (1b).

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