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1240492-11-8

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1240492-11-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1240492-11-8 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,4,9 and 2 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1240492-11:
(9*1)+(8*2)+(7*4)+(6*0)+(5*4)+(4*9)+(3*2)+(2*1)+(1*1)=118
118 % 10 = 8
So 1240492-11-8 is a valid CAS Registry Number.

1240492-11-8Relevant articles and documents

Enantioselective synthesis of trans-aryl-and-heteroaryl-substituted cyclopropylboronates by copper (I)-catalyzed reactions of allylic phosphates with a diboron derivative

Zhong, Chongmin,Kunii, Shun,Kosaka, Yuki,Sawamura, Masaya,Ito, Hajime

supporting information; experimental part, p. 11440 - 11442 (2010/10/04)

A new asymmetric route for the synthesis of trans-2-aryl- and -heteroaryl-substituted cyclopropylboronates has been developed. (Z)-3-arylallylic phosphates were converted to the optically active products with high yield and diastereo- and enantioselectivity through a copper(I)-catalyzed reaction with a diboron derivative. Under mild reaction conditions, the reaction affords the arylcyclopropane products with a functional group and a heteroaromatic group in a highly enantioselective manner. When (E)-allylic phosphates were used as substrates, a ligand-controlled product switch between the trans and cis configurations was observed.

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