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638188-40-6

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638188-40-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 638188-40-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,8,1,8 and 8 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 638188-40:
(8*6)+(7*3)+(6*8)+(5*1)+(4*8)+(3*8)+(2*4)+(1*0)=186
186 % 10 = 6
So 638188-40-6 is a valid CAS Registry Number.

638188-40-6Downstream Products

638188-40-6Relevant articles and documents

The proline-catalyzed asymmetric amination of branched aldehydes

Baumann, Thomas,Vogt, Henning,Braese, Stefan

, p. 266 - 282 (2007)

An efficient access to configurationally stable α,β- disubstituted α-amino aldehydes, oxazolidinones, and α-amino acids has been presented. Starting from simple and easily available racemic aldehydes, the α-aminated products were obtained using azodicarboxylates as the nitrogen source in up to 86 % ee and moderate to excellent yield. These products could further be converted both into the corresponding α-amino alcohols and, depending on the residue of the azodicarboxylates and the reaction conditions, into the oxazolidinones. On the other hand, oxidation towards the carboxylic acid and cleavage of the hydrazide bond under mild conditions revealed the free α-alkylated phenylglycine derivative. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

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