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313468-81-4

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313468-81-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 313468-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,3,4,6 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 313468-81:
(8*3)+(7*1)+(6*3)+(5*4)+(4*6)+(3*8)+(2*8)+(1*1)=134
134 % 10 = 4
So 313468-81-4 is a valid CAS Registry Number.

313468-81-4Relevant articles and documents

A novel approach in drug discovery: Synthesis of estrone-talaromycin natural product hybrids

Tietze, Lutz F.,Schneider, Gyula,Woelfling, Janos,Fecher, Anja,Noebel, Thomas,Petersen, Soenke,Schuberth, Ingrid,Wulff, Christian

, p. 3755 - 3760 (2007/10/03)

Hetero-Diels - Alder reaction of the steroidal exocyclic enol ethers 14 and 15, obtained from the secoestrones 8 and 9 by reduction, iodoetherification, and elimination, with ethyl O-benzoyldiformylacetate (16) leads to the spiroacetals 17 and 18 as a mixture of four diastereomers. Reduction of the major diastereomers 17a and 18 a with DIBAH and subsequent hydrogenation yields the novel natural product hybrids 21, 23, 24, and 25, which possess the structural features of the steroid estrone (7) and the mycotoxin talaromycin 6.

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