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(4R,5S)-5-(tert-butoxycarbonyl)-1-(9-phenylfluoren-9-yl)-4-benzylimidazolidin-2-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

128657-45-4

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128657-45-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128657-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,6,5 and 7 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128657-45:
(8*1)+(7*2)+(6*8)+(5*6)+(4*5)+(3*7)+(2*4)+(1*5)=154
154 % 10 = 4
So 128657-45-4 is a valid CAS Registry Number.

128657-45-4Relevant academic research and scientific papers

Stereoselective Synthesis of 2,3-Diamino Acids. 2,3-Diamino-4-phenylbutanoic Acid

Dunn, Peter J.,Haener, Robert,Rapoport, Henry

, p. 5017 - 5025 (2007/10/02)

The synthesis of (2S,3S)- and (2S,3R)-2,3-diamino-4-phenylbutanoic acid (1c and 3) from L-aspartic acid is described.The N-(phenylfluorenyl)-protected aspartic acid diesters 4 and 10 (α-tert-butyl, β-methyl), 18 (β-benzyl, α-tert-butyl), and 28 (β-benzyl,

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