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91890-89-0

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91890-89-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91890-89-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,8,9 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91890-89:
(7*9)+(6*1)+(5*8)+(4*9)+(3*0)+(2*8)+(1*9)=170
170 % 10 = 0
So 91890-89-0 is a valid CAS Registry Number.

91890-89-0Downstream Products

91890-89-0Relevant articles and documents

α,β-unsaturated aldehydes as substrates for asymmetric C-C bond forming reactions with thiamin diphosphate (ThDP)-dependent enzymes

Cosp, Anabel,Dresen, Carola,Pohl, Martina,Walter, Lydia,Roehr, Caroline,Mueller, Michael

experimental part, p. 759 - 771 (2009/04/10)

The enzymes benzaldehyde lyase (BAL) from Pseudomonas fluorescens, benzoylformate decarboxylase (BFD) from Pseudomonas putida and pyruvate decarboxylase (PDC) from Saccharomyces cerevisiae provide different C-C bond forming possibilities of α,β-unsaturated aldehydes with aliphatic and aromatic aldehydes. Structure elucidation and determination of the absolute configuration of the products, which were obtained with high regio- and stereoselectivity were carried out. Selective 1,2-reactivity with yields of 75% and >98% ee, for one single isomer (A) were obtained, by choosing the suitable enzyme in combination with the appropriate substrates. By varying enzymes or substrates the regioisomeric hydroxy ketones C, with up to >99% ee, can be obtained. The application of these new chiral building blocks in the synthesis of natural products or biological active substances is considerably facilitated by applying the different ThDP-dependent enzymes as catalysts.

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