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138456-69-6

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138456-69-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138456-69-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,4,5 and 6 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 138456-69:
(8*1)+(7*3)+(6*8)+(5*4)+(4*5)+(3*6)+(2*6)+(1*9)=156
156 % 10 = 6
So 138456-69-6 is a valid CAS Registry Number.

138456-69-6Downstream Products

138456-69-6Relevant articles and documents

Stereoselective reactions. XX. Synthetic studies on optically active β-lactams. III. Stereocontrolled synthesis of chiral intermediate to (+)-thienamycin from D-glucose

Ikota,Yoshino,Koga

, p. 2201 - 2206 (2007/10/02)

A chiral key intermediate (19a) for the synthesis of (+)-thienamycin was synthesized starting from D-glucose. The enol ether 13, obtained from the ketone 11 by Horner-Wittig reaction, was transformed to the corresponding methyl ester 16 by pyridinium chlorochromate oxidation or by employing the Wacker process. The ester 16 was further converted to the β-lactam 19a, which is a useful chiral precursor to (+)-thienamycin.

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