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4031-57-6

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4031-57-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4031-57-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,3 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 4031-57:
(6*4)+(5*0)+(4*3)+(3*1)+(2*5)+(1*7)=56
56 % 10 = 6
So 4031-57-6 is a valid CAS Registry Number.

4031-57-6Relevant articles and documents

Stereoselective selenium catalyzed dihydroxylation and hydroxymethoxylation of alkenes

Santi, Claudio,Di Lorenzo, Rosalia,Tidei, Caterina,Bagnoli, Luana,Wirth, Thomas

, p. 10530 - 10535,6 (2012/12/12)

The selenium atom of the selenocysteine plays a crucial role in the reduction of peroxides. Herein we showed that, in the absence of a thiol cofactor, the same aminoacid efficiently catalyzed the dihydroxylation of carbon-carbon double bonds leading to the stereoselective formation of 1,2-diols at room temperature and in on water conditions. Alternatively, in the presence of methanol, the corresponding β-methoxyalcohol can be prepared. The stereoselectivity of the reaction will be discussed and NMR evidences of the actual catalyst are here reported.

Hydrogenation en phase liquide sur Pd/C de derives mono et disubstitues du limonene

Pavia, Andre Armand,Geneste, Patrick,Olive, Jean-Louis

, p. 24 - 27 (2007/10/02)

Various derivatives of limonene, either monosubstituted: cis and trans-β-terpineols, (+) neodihydrocarveol, (-) isopulegol, or disubstituted: (+)-trans-N,N-2-dimethylamino-8-trans-p-menthene-1-ol, (+)-N,N-1-dimethylaminoneodihydrocarveol and (+)-trans-N,N-2-dimethylamino-8-cis-p-menthene-1-ol, have been hydrogenated on Pd/C or Adams PtO2 at 25 deg C and under a pressure of 1 atm in ether.With PtO2 the only product obtained has the same configuration as the starting material.On the opposite, due to its isomerising character, Pd/C leads to a mixture of two stereoisomers by racemisation of the asymmetric carbon at position 4 through migration of the exocyclic isopropenyl double bond.In the case of (+) neohydrocarvomenthone (4R) the double bond enters the ring, and so (+) carvomenthone (4R) and (-) isocarvomenthone (4S) are obtained.

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