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54639-27-9

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54639-27-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54639-27-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,6,3 and 9 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 54639-27:
(7*5)+(6*4)+(5*6)+(4*3)+(3*9)+(2*2)+(1*7)=139
139 % 10 = 9
So 54639-27-9 is a valid CAS Registry Number.

54639-27-9Downstream Products

54639-27-9Relevant articles and documents

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Baker,Stanonis

, p. 699,701 (1951)

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Synthesis of enantiopure (S)-α-hydroxy carboxanilides from (S)-α-amino acids

Girreser,Noe

, p. 1223 - 1224 (2007/10/02)

α-Hydroxy carboxanilides 3 a-c were obtained without racemization in a synthetically simple way starting from the corresponding α-amino acids by diazotization and subsequent treatment of the sodium α-hydroxy carboxylates with anilinium chloride in moderate yields. The enantiopurity of 3a-c was easily determined by 1H NMR spectroscopy of the diastereomeric O,O-acetals 5/6a-c derived from exo-lactol 4.

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