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137441-49-7

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137441-49-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137441-49-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,4,4 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 137441-49:
(8*1)+(7*3)+(6*7)+(5*4)+(4*4)+(3*1)+(2*4)+(1*9)=127
127 % 10 = 7
So 137441-49-7 is a valid CAS Registry Number.

137441-49-7Downstream Products

137441-49-7Relevant academic research and scientific papers

Chiral Induction in Cycloaddition Reactions of Azomethine Ylides Derived from Secondary α-Amino Acids by the Decarboxylative Route

Coulter, Thomas,Grigg, Ronald,Malone, John F.,Sridharan, Visuvanathar

, p. 5417 - 5420 (1991)

Cyclic secondary α-amino acids react with isatin and menthyl acrylate via decarboxylative azomethine ylide formation and subsequent cycloaddition involving an endo-transition state to give cycloadducts in 67-82percent d.e.The stereochemistry of the major cycloadduct is assigned from a single crystal X-ray structure and a transition state model is proposed for the process. Key Words: 1,3-Dipole; cycloaddition; decarboxylation; chiral induction.

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