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1258209-18-5

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1258209-18-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1258209-18-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,8,2,0 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1258209-18:
(9*1)+(8*2)+(7*5)+(6*8)+(5*2)+(4*0)+(3*9)+(2*1)+(1*8)=155
155 % 10 = 5
So 1258209-18-5 is a valid CAS Registry Number.

1258209-18-5Relevant articles and documents

Catalytic enantioselective vinylogous Mukaiyama-Michael addition of 2-silyloxyfurans to cyclic unsaturated oxo esters

Jusseau, Xavier,Retailleau, Pascal,Chabaud, Laurent,Guillou, Catherine

supporting information, p. 2289 - 2300 (2013/04/24)

The copper-catalyzed asymmetric addition of 2-silyloxyfurans to cyclic unsaturated oxo esters is reported. The reaction proceeds with excellent diastereocontrol (usually dr 99:1) and modest to high enantioselectivity, depending on the nature of the ester group and the substitution of the cyclic oxo ester. We have shown that these substrates can be transformed into a variety of building blocks bearing a γ-butenolide or γ-lactone connected to a cycloalkane or cycoalkene moiety.

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