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88425-33-6

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88425-33-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 88425-33-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,8,4,2 and 5 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 88425-33:
(7*8)+(6*8)+(5*4)+(4*2)+(3*5)+(2*3)+(1*3)=156
156 % 10 = 6
So 88425-33-6 is a valid CAS Registry Number.

88425-33-6Relevant articles and documents

alpha -AMINO ACIDS AS CHIRAL EDUCTS FOR ASYMMETRIC PRODUCTS. A GENERAL SYNTHESIS OF D- alpha -AMINO ACIDS FROM L-SERINE.

Maurer,Takahata,Rapoport

, p. 1095 - 1098 (2007/10/02)

A short and chirally efficient synthesis of four D- alpha -amino acids is described with L-serine as the chiral educt. The key C-C bond-forming reactions are the aminoacylations of organometallics with the lithium salt of N-(phenylsulfonyl)-L-serine (2) to give optically pure N-blocked alpha -amino ketones. Reduction of the carbonyl group to carbinol or methylene followed by oxidation of the hydroxymethyl to carboxyl gives the N-blocked D-amino acids. The examples investigated (norleucine, alpha -aminopimelic acid, DOPA, and allothreonine) demonstrate the broad applicability of the method.

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