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1280739-23-2

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1280739-23-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1280739-23-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,0,7,3 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1280739-23:
(9*1)+(8*2)+(7*8)+(6*0)+(5*7)+(4*3)+(3*9)+(2*2)+(1*3)=162
162 % 10 = 2
So 1280739-23-2 is a valid CAS Registry Number.

1280739-23-2Relevant articles and documents

A highly regio- and stereoselective cascade annulation of enals and benzodi(enone)s catalyzed by N-heterocyclic carbenes

Fang, Xinqiang,Jiang, Kun,Xing, Chong,Hao, Lin,Chi, Yonggui Robin

, p. 1910 - 1913 (2011/04/16)

Three stereogenic centers in a row: The unconventional activation of enal compounds mediated by an N-heterocyclic carbene (NHC) has generated three consecutive reactive carbon centers that undergo highly regio- and stereoselective annulations with di(enone)s to generate benzotricyclic products containing multiple stereogenic centers (see scheme).

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