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129139-66-8

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129139-66-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 129139-66-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,1,3 and 9 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 129139-66:
(8*1)+(7*2)+(6*9)+(5*1)+(4*3)+(3*9)+(2*6)+(1*6)=138
138 % 10 = 8
So 129139-66-8 is a valid CAS Registry Number.

129139-66-8Downstream Products

129139-66-8Relevant articles and documents

Lithium alkoxide-promoted michael reaction between silyl enolates and α,β-unsaturated carbonyl compounds

Mukaiyama, Teruaki,Tozawa, Takashi,Fujisawa, Hidehiko

, p. 1410 - 1411 (2007/10/03)

Michael reaction between silyl enolates and α,β-unsaturated carbonyl compounds by using a catalytic amount of Lewis base such as lithium alkoxide in DMF proceeds smoothly to afford the corresponding Michael-adducts in good yields with moderate to high diastereoselectivities. This reaction can be reasonably explained by considering an alkoxide anion-initiated autocatalytic process.

Indium-trichloride catalyzed Michael reaction of silyl enol ethers with α,β-unsaturated carbonyl compounds under neat condition

Loh, Teck-Peng,Wei, Lin-Li

, p. 7615 - 7624 (2007/10/03)

In the presence of a catalytic amount of indium (III) trichloride (InCl3) (20 mol%), ketene silyl enol ethers react quickly with α, β- unsaturated ketones and esters to afford the corresponding Michael adducts in moderate to good yields. Indium(III) trichloride can be recovered and reused without decrease in yields.

Stereoselective Michael additions of titanium "ate" complexes of ketone and ester enolates

Bernardi, Anna,Dotti, Pierfranco,Poli, Giovanni,Scolastico, Carlo

, p. 5597 - 5606 (2007/10/02)

The conjugate addition of Ti "ate" complexes of ketone and ester enolates to α,β-unsaturated carbonyl compounds was studied. The reaction was found to be highly regio- and stereoselective. Compared to the lithium enolates, ketone enolate Ti complexes show

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