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131140-40-4

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131140-40-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131140-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,1,4 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 131140-40:
(8*1)+(7*3)+(6*1)+(5*1)+(4*4)+(3*0)+(2*4)+(1*0)=64
64 % 10 = 4
So 131140-40-4 is a valid CAS Registry Number.

131140-40-4Downstream Products

131140-40-4Relevant articles and documents

Catalytic iron-mediated ene carbocyclizations: Formal [4+4]-ene reactions of triene esters

Takacs, James M.,Newsome, Peter W.,Kuehn, Cynthia,Takusagawa, Fusao

, p. 5507 - 5522 (2007/10/02)

2-Substituted-2,7,9-decatrienoates undergo an iron-catalyzed carbocyclization to yield trans-disubstituted cyclopentanes in moderate-to-good chemical yields. The cyclization products are formally the result of a [4+4]-ene reaction in which cis-propenyl and 2-acroyl functionalities are introduced as appendages to the newly formed cyclopentane ring by the cyclization. Triene ester substrates bearing an alkyl substituent at the 4- or 6-positions cyclize with high 1,2-stereoinduction to yield trisubstituted cyclopentanes in which the relative stereochemistry between three contiguous stereocenters is controlled.

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