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77461-75-7

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77461-75-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77461-75-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,4,6 and 1 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 77461-75:
(7*7)+(6*7)+(5*4)+(4*6)+(3*1)+(2*7)+(1*5)=157
157 % 10 = 7
So 77461-75-7 is a valid CAS Registry Number.

77461-75-7Relevant articles and documents

Synthesis and Stereochemistry of 3,5-Bis(carbomethoxy)-2,6-diphenyltetrahydro-4H-thiopyran-4-ones and Derivatives

Chen, Chin H.,Reynolds, George A.,Cossar, Bernard C.

, p. 2752 - 2757 (2007/10/02)

3,5-Bis(carbomethoxy)-2,6-diphenyl-4H-thiopyran-4-one (2) and its 5,6-trans-dihydro derivative 14 were synthesized by dehydrogenation with active manganese dioxide in refluxing chloroform of the corresponding diastereoisomeric mixture of cis- and trans-2,6-diphenyltetrahydro compounds 5 and 6.The latter were prepared by the addition of hydrogen sulfide to dimethyl dibenzalacetonedicarboxylate (4).The stereochemistry and the reaction with N-chlorosuccinimide (NCS) of the diastereoisomers 5 and 6 and their corresponding sulfoxides 11 and 8 are elucidated.NCS reacted at the active methylene position in preference to the sulfide or sulfoxide function.

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