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339274-36-1

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339274-36-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 339274-36-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,3,9,2,7 and 4 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 339274-36:
(8*3)+(7*3)+(6*9)+(5*2)+(4*7)+(3*4)+(2*3)+(1*6)=161
161 % 10 = 1
So 339274-36-1 is a valid CAS Registry Number.

339274-36-1Relevant articles and documents

Versatile synthesis of malonamic acid derivatives from a β-ketothioester

López-Alvarado, Pilar,Avenda?o, Carmen,Carlos Menéndez, J

, p. 4479 - 4482 (2007/10/03)

An efficient synthetic route is described that allows the preparation under mild conditions of several types of malonamic acid derivatives. The S-tert-butyl acetothioacetate monoanion reacted with aryl or alkyl isocyanates to give β-amidothioesters in one step and 73-87% yield, after spontaneous deacetylation of tricarbonyl intermediates. Treatment of these thioesters with several aliphatic or aromatic alcohols and amines at room temperature in THF or DME and in the presence of silver trifluoroacetate provided, respectively, the corresponding malonamic acid esters and malonamides in 80-100% yield.

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