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L-Valine, N-[(4-chlorophenyl)methylene]-, 1,1-dimethylethyl ester, (E)- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

139404-90-3

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139404-90-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139404-90-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,0 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 139404-90:
(8*1)+(7*3)+(6*9)+(5*4)+(4*0)+(3*4)+(2*9)+(1*0)=133
133 % 10 = 3
So 139404-90-3 is a valid CAS Registry Number.

139404-90-3Relevant academic research and scientific papers

Asymmetric aza Diels-Alder reactions of amino acid ester imines with Brassard's diene

Waldmann,Braun,Drager

, p. 1231 - 1246 (1991)

Imines 1 obtained from aromatic, aliphatic or functionalized aldehydes and valine tert-butyl ester undergo Lewis acid catalyzed hetero Diels-Alder reactions with Brassard's diene 2. The cycloadducts are formed in good to high yields and with diastereomer

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