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131139-94-1

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131139-94-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131139-94-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,1,3 and 9 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 131139-94:
(8*1)+(7*3)+(6*1)+(5*1)+(4*3)+(3*9)+(2*9)+(1*4)=101
101 % 10 = 1
So 131139-94-1 is a valid CAS Registry Number.

131139-94-1Downstream Products

131139-94-1Relevant articles and documents

Asymmetric conjugate addition of organometallic reagents to chiral α,β-unsaturated esters

Fang,Ogawa,Suemune,Sakai

, p. 389 - 398 (2007/10/02)

Asymmetric conjugate addition to α,β-unsaturated ester was studied using four kinds of cyclic diols (1c-4c) as chiral auxiliaries. Among the tested substrates, (R,R)-cyclohexane-1,2-diol derivatives (6a-c) and (1R,2S)-2-hydroxymethylcyclopentanol derivative (7a) showed high and reverse diastereoselectivity in conjugate addition by organocuprates (R2CuLi) and/or Grignard reagents in the presence of copper iodide (RMgBr + CuI), respectively.

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