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13241-44-6

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13241-44-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13241-44-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,2,4 and 1 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 13241-44:
(7*1)+(6*3)+(5*2)+(4*4)+(3*1)+(2*4)+(1*4)=66
66 % 10 = 6
So 13241-44-6 is a valid CAS Registry Number.

13241-44-6Relevant articles and documents

Design of the new molecular transport systems for the nucleosides - Pharmacophores carrying

Berezovskaya,Chudinov,Kirillova,Shastina,Shvets,Yurkevich

, p. 2127 - 2133 (1998)

The structure design of a specific and nonspecific transport systems for nucleosides was proposed. A number of model compounds were synthesized.

Using imidazolium-based ionic liquids as dual solvent-catalysts for sustainable synthesis of vitamin esters: Inspiration from bio- and organo-catalysis

Tao, Yifeng,Dong, Ruijuan,Pavlidis, Ioannis V.,Chen, Biqiang,Tan, Tianwei

supporting information, p. 1240 - 1248 (2016/03/09)

Vitamin E (VE) has significant biological activities and thus its acylation to increase its stability is of extreme interest. We developed an efficient and sustainable approach using imidazolium-based ionic liquids as dual solvent-catalysts for the esterification between α-tocopherol (the most active form of VE) and succinic anhydride. Although in literature it is reported that lipase can catalyze this reaction, hereby we demonstrate that the reaction observed in DMSO and DMF is catalyzed by the histidyl residues of the protein. Histidine and its analogue containing an imidazole ring were tested as organocatalysts for the production of α-tocopherol succinate. In light of the imidazole organocatalysis, commercially-available 3-alkyl-1-methyl imidazolium ILs [CnC1Im][X-] were investigated as dual solvent-catalysts for the esterification of α-tocopherol with succinic anhydride, and provided satisfactory yields and reaction rates. [C5C1Im][NO3-] can be recycled by water extraction, instead of organic solvent extraction to separate α-tocopherol succinate from [C5C1Im][NO3-], with an average yield of 94.1% for 4 subsequent batches, while the catalytic activity of the recycled ILs showed almost no loss after 4 batches. The developed protocol for the synthesis of α-tocopherol esters and IL recycling bears industrial potential due to the ease of use and the efficient recycling.

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