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74457-38-8

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74457-38-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74457-38-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,4,5 and 7 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 74457-38:
(7*7)+(6*4)+(5*4)+(4*5)+(3*7)+(2*3)+(1*8)=148
148 % 10 = 8
So 74457-38-8 is a valid CAS Registry Number.

74457-38-8Relevant articles and documents

Free and immobilized lecitase ultra as the biocatalyst in the kinetic resolution of (E)‐4‐arylbut‐3‐en‐2‐yl esters

Chojnacka, Anna,Drozd, Rados?aw,G?adkowski, Witold,Le?niarek, Aleksandra,Szymańska, Magdalena

, (2020/03/17)

The influence of buffer type, co‐solvent type, and acyl chain length was investigated for the enantioselective hydrolysis of racemic 4‐arylbut‐3‐en‐2‐yl esters using Lecitase Ultra (LU). Immobilized preparations of the Lecitase Ultra enzyme had

Highly enantioselective synthesis of 3-substituted furanones by palladium-catalyzed kinetic resolution of unsymmetrical allyl acetates

Mao, Bin,Ji, Yining,Fananas-Mastral, Martin,Caroli, Giuseppe,Meetsma, Auke,Feringa, Ben L.

, p. 3168 - 3173 (2012/05/05)

Resolving the issue: A near-perfect Pd-catalyzed kinetic resolution of 1,3-disubstituted unsymmetrical allylic acetates uses silyl enol ethers as nucleophiles to access the important 3-substituted-furanone scaffold (see scheme; DACH=diaminocyclohexyl, dba=dibenzylideneacetone). The reaction proceeds under mild conditions and provides the desired products with excellent chemo-, regio-, and enantioselectivity. Copyright

Asymmetric transesterification of secondary alcohols catalyzed by feruloyl esterase from Humicola insolens

Hatzakis, Nikos S.,Smonou, Ioulia

, p. 325 - 337 (2007/10/03)

A new asymmetric transesterification of secondary alcohols catalyzed by feruloyl esterase from Humicola insolens has been found. Although alcohols are not the natural substrates for this enzyme, a high R enantioselectivity was observed. Stereochemical studies showed that variations in substrate structure lead to strong variations in enantioselectivity. The highest enantioselectivities are obtained when the β-carbon of the secondary alcohol is tertiary or quaternary.

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