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1254120-31-4

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1254120-31-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1254120-31-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,4,1,2 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1254120-31:
(9*1)+(8*2)+(7*5)+(6*4)+(5*1)+(4*2)+(3*0)+(2*3)+(1*1)=104
104 % 10 = 4
So 1254120-31-4 is a valid CAS Registry Number.

1254120-31-4Downstream Products

1254120-31-4Relevant articles and documents

Enantioselective synthesis of cyclic, quaternary oxonitriles

Guenes, Yakup,Polat, M. Fatih,Sahin, Ertan,Fleming, Fraser F.,Altundas, Ramazan

supporting information; experimental part, p. 7092 - 7098 (2010/12/24)

Quaternary oxonitriles are stereoselectively generated from the union of five-, six-, and seven-membered 2-chloroalkenecarbonitriles with chiral alcohols via a Claisen rearrangement. The strategy rests on a new conjugate addition-elimination of allylic alkoxides to 2-chlorocycloalkenecarbonitriles to afford substituted 2-alkoxyalkenenitriles. Subsequent thermolysis unmasks a cyclic oxonitrile while selectively forming a new quaternary center with enantiomeric ratios typically greater than 9:1. The overall alkylation strategy addresses the challenge of enantioselectively generating hindered, quaternary centers while simultaneously installing ketone, nitrile, and olefin functionalities.

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