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405938-56-9

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405938-56-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 405938-56-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,5,9,3 and 8 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 405938-56:
(8*4)+(7*0)+(6*5)+(5*9)+(4*3)+(3*8)+(2*5)+(1*6)=159
159 % 10 = 9
So 405938-56-9 is a valid CAS Registry Number.

405938-56-9Relevant articles and documents

Stereoselective syntheses of syn 5-[1-hydroxy-2-(2-bromo-phenyl)-ethyl]-5-methyl-5H-furan-2-one and syn 5-[1-hydroxy-2-(2-methoxy-phenyl)-ethyl]-5-methyl-5H-furan-2-one

Redero, Elena,Sandoval, Celso,Bermejo, Francisco

, p. 9597 - 9605 (2001)

The aldol condensation of 2-(tert-butyldimethylsilyloxy)-5-methyl-furan 4 with several phenylacetaldehydes led stereoselectively to the syn or the anti aldols under fluoride- or Lewis-acid-promoted conditions. However low yields are obtained due to the fo

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