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142683-64-5

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142683-64-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142683-64-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,6,8 and 3 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 142683-64:
(8*1)+(7*4)+(6*2)+(5*6)+(4*8)+(3*3)+(2*6)+(1*4)=135
135 % 10 = 5
So 142683-64-5 is a valid CAS Registry Number.

142683-64-5Relevant articles and documents

Stereoselective syntheses of the antibiotics (+)-negamycin and (-)-HON (RI-331)

Schmidt,Stabler,Lieberknecht

, p. 482 - 486 (2007/10/02)

The stereoselective syntheses of the antibiotics (-)-HON (5-hydroxy-4-oxo-L-norvaline, RI-331) and (+)-negamycin starting from (S)-4-[(Z)-2-(benzyloxycarbonylamino)-2-(tert-butoxycarbonyl)vinyl]-2, 2-dimethyl-1,3-dioxolane and (R)-3-benzyloxycarbonyl-5-[(Z)-2-(tert-butoxycarbonylamino)-2-(methoxy carbonyl) vinyl]-2,2-dimethyl-1,3-oxazolidine, respectively, are described.

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