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81562-09-6

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81562-09-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81562-09-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,6 and 2 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 81562-09:
(7*8)+(6*1)+(5*5)+(4*6)+(3*2)+(2*0)+(1*9)=126
126 % 10 = 6
So 81562-09-6 is a valid CAS Registry Number.

81562-09-6Relevant articles and documents

1,2-MONO-, 1,2:3,5-DI-, AND 1,2:5,6-DI-O-ISOPROPYLIDENE-β-L-IDOFURANOSES; AN EXAMPLE OF 1,3-DIOXOLANE-1,3-DIOXANE ISOMERISATION

Hughes, Neil A.,Munkombwe, Namboole M.

, p. 221 - 230 (1982)

Simple preparative routes to 1,2-O-isopropylidene- and 1,2:5,6-di-O-isopropylideneβ-L-idofuranoses are described.The 1,2:5,6-diacetal is the kinetic product of the reaction of 1,2-O-isopropylidene-β-L-idofuranose with acetone and 2,2-dimethoxypropane in the presence of toluene-p-sulphonic acid but, during longer reaction times, isomerisation to 1,2:3,5-di-O-siopropylidene-β-L-idofuranose occurs, resulting in a approximately equal mixture of the two diacetals.

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