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273203-43-3

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273203-43-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 273203-43-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,7,3,2,0 and 3 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 273203-43:
(8*2)+(7*7)+(6*3)+(5*2)+(4*0)+(3*3)+(2*4)+(1*3)=113
113 % 10 = 3
So 273203-43-3 is a valid CAS Registry Number.

273203-43-3Downstream Products

273203-43-3Relevant articles and documents

Mannich type reactions of acylhydrazones with silyl enolates for the synthesis of β-amino ester, β-amino ketone, β-lactam, pyrazolidinone, and pyrazolone derivatives

Okitsu, Osamu,Oyamada, Hidekazu,Furuta, Takayuki,Kobayashi, Shu

, p. 1143 - 1162 (2007/10/03)

In the presence of a catalytic amount of a rare earth triflate, acylhydrazones reacted with silyl enolates to afford the corresponding β-N'- acylhydrazino esters in high yields. A three-component reaction of an aldehyde, an acylhydrazine, and a silyl enolate was also performed successfully. The hydrazino esters thus obtained were readily converted to β-amino ester, β-amino ketone, β-lactam, pyrazolidinone, and pyrazolinone derivatives.

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