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1243634-57-2

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1243634-57-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1243634-57-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,3,6,3 and 4 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1243634-57:
(9*1)+(8*2)+(7*4)+(6*3)+(5*6)+(4*3)+(3*4)+(2*5)+(1*7)=142
142 % 10 = 2
So 1243634-57-2 is a valid CAS Registry Number.

1243634-57-2Relevant articles and documents

Concise catalytic asymmetric total synthesis of biologically active tropane alkaloids

Cordova, Armando,Lin, Shuangzheng,Tseggai, Abrehet

, p. 1363 - 1372 (2012)

A general strategy for the total asymmetric synthesis of valuable tropane alkaloids by catalytic stereoselective transformations is disclosed. The power of this approach is exemplified by the concise catalytic enantioselective total syntheses of (+)-methylecgonine, (-)-cocaine and (+)-cocaine as well as the first catalytic asymmetric total syntheses of a cocaine C-1 derivative and (+)-ferruginine starting from 5-oxo-protected-α,β-unsaturated enals using only two and three column chromatographic purification steps, respectively. Copyright

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