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5-methylene-1,3-diphenyl-imidazolidine-2,4-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21249-44-5

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21249-44-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21249-44-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,4 and 9 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21249-44:
(7*2)+(6*1)+(5*2)+(4*4)+(3*9)+(2*4)+(1*4)=85
85 % 10 = 5
So 21249-44-5 is a valid CAS Registry Number.

21249-44-5Downstream Products

21249-44-5Relevant academic research and scientific papers

Acetylenic Amides. 3. The Synthesis of 5-Methylene-2,4-imidazolidinediones From 2-Propynamides and Isocyanates

Coppola, Gary M.,Damon, Robert E.

, p. 1141 - 1144 (2007/10/02)

2-Propynamides react with aryl isocyanates in the presence of triethylamine to give 5-methylene-2,4-imidazolidinediones 5 in good yields.If the propynamide contains a terminal trimethylsilyl group, Z-trimethylsilylidenehydantoin (7) is produced.

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