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1274795-53-7

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1274795-53-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1274795-53-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,7,4,7,9 and 5 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1274795-53:
(9*1)+(8*2)+(7*7)+(6*4)+(5*7)+(4*9)+(3*5)+(2*5)+(1*3)=197
197 % 10 = 7
So 1274795-53-7 is a valid CAS Registry Number.

1274795-53-7Relevant articles and documents

Asymmetric synthesis of the tricyclic core of calyciphylline A-type alkaloids via intramolecular [3 + 2] cycloaddition

Wang, Lu,Xu, Chen,Chen, Li,Hao, Xiaojiang,Wang, David Zhigang

, p. 1076 - 1079 (2014/03/21)

Asymmetric synthesis of the [5-6-7] tricyclic system common to the Calyciphylline A-type alkaloids is reported, featuring Overman rearrangement, Heck cyclization, intramolecular [3 + 2] cycloaddition, diastereoselective hydrogenation, and Claisen rearrangement as strategic events. The approach is capable of installing the crucial carbonyl functionality as well as multiple stereogenic centers within a congested polycyclic ring skeleton.

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