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1256973-71-3

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1256973-71-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1256973-71-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,6,9,7 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1256973-71:
(9*1)+(8*2)+(7*5)+(6*6)+(5*9)+(4*7)+(3*3)+(2*7)+(1*1)=193
193 % 10 = 3
So 1256973-71-3 is a valid CAS Registry Number.

1256973-71-3Downstream Products

1256973-71-3Relevant articles and documents

N -(2-Pyridylmethyl)imines as azomethine precursors in catalytic asymmetric [3 + 2] cycloadditions

Padilla, Silvia,Tejero, Ruben,Adrio, Javier,Carretero, Juan C.

supporting information; experimental part, p. 5608 - 5611 (2011/03/20)

An efficient Cu(I)-catalyzed asymmetric [3 + 2] cycloaddition of N-(2-pyridylmethyl) imines has been developed. In the presence of a Cu(CH 3CN)4PF6/bisoxazoline catalyst system, high levels of enantioselectivity (up to 97% ee) and moderate to high exo selectivity were achieved with a wide variety of substituted dipolarophiles, including maleimides, fumarates, fumarodinitrile, enones, and nitroalkenes. The reaction with unsymmetrically substituted dipolarophiles is completely regioselective.

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