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725264-64-2

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725264-64-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 725264-64-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,2,5,2,6 and 4 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 725264-64:
(8*7)+(7*2)+(6*5)+(5*2)+(4*6)+(3*4)+(2*6)+(1*4)=162
162 % 10 = 2
So 725264-64-2 is a valid CAS Registry Number.

725264-64-2Relevant articles and documents

Production method of hexahydrofurofuranol derivative, intermediate therefor and production method thereof

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, (2008/06/13)

The present invention provides a method for producing compound (XIV) useful as an intermediate for pharmaceutical agents efficiently and economically on an industrial scale without using ozone oxidation and highly toxic reagent, and an intermediate used for this method. Particularly, the present invention provides a method for producing a compound having an absolute configuration represented by the formula (XV) and an enantiomer thereof without using a technique such as optical resolution and the like, and an intermediate used for this method. (1) Compound (XIII) as a starting material is led to compound (I), and after introducing a protecting group, subjected to reduction and cyclization to give compound (XIV). Particularly, compound (XIII) as a material is led to compound (I) via compound (XX) to produce compound (XIV). Using an optically active compound (XIII) as a starting material, a compound having an absolute configuration represented by the formula (XV) and the like are produced highly stereoselectively. (2) Compound (XXI) as a starting material is stereoselectively reduced to give compound (XXII), and by introduction of a protecting group, reduction and cyclization, compound (XXVI) is obtained, and by inverting hydroxyl group, compound (XV) is produced. wherein each symbol is as defined in the specification.

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