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4-Acetyl-4-isopropyl-2-phenyl-2-oxazolin-5-on is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21944-43-4

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21944-43-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21944-43-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,4 and 4 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21944-43:
(7*2)+(6*1)+(5*9)+(4*4)+(3*4)+(2*4)+(1*3)=104
104 % 10 = 4
So 21944-43-4 is a valid CAS Registry Number.

21944-43-4Relevant academic research and scientific papers

Asymmetric synthesis of all stereoisomers of a-methylthreonine using an organocatalytic steglich rearrangement reaction as a key step

Dietz, Friedrich R.,Groeger, Harald

experimental part, p. 4208 - 4218 (2011/04/12)

An efficient synthetic route to all four stereoisomers of a-methylthreonine has been established. Each type of stereoisomer has been isolated in diastereomerically pure form and with an enantiomeric excess of at least 86% ee. The key step in this multi-st

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