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1213770-24-1

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1213770-24-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1213770-24-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,3,7,7 and 0 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1213770-24:
(9*1)+(8*2)+(7*1)+(6*3)+(5*7)+(4*7)+(3*0)+(2*2)+(1*4)=121
121 % 10 = 1
So 1213770-24-1 is a valid CAS Registry Number.

1213770-24-1Relevant articles and documents

Organocatalyzed regioselective and enantioselective synthesis of 1,4- and 1,2-dihydropyridines

Le, Truong-Giang,Pham, Hoai-Thu,Martin, James P.,Chataigner, Isabelle,Renaud, Jean-Luc

, p. 2673 - 2684 (2020)

Herein, we introduce one of the first examples of asymmetric organocatalyzed synthesis of 1,2-dihydropyridines, affording enantioselective access to and partially solving regioselectivity challenges in the synthesis of dihydropyridines. We demonstrate that through modification of organocatalysts both 1,2- and 1,4-dihydropyridines (1,2- and 1,4-DHPs) can be obtained with high regioselectivity (ratio of 1,2-DHP/1,4-DHP from 95/5 to 0/100) and enantioselectivity (33% ee for 1,2-DHPs and up to 98% ee for 1,4-DHPs) in good yields (up to 87%).

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