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301153-94-6

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301153-94-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 301153-94-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,1,1,5 and 3 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 301153-94:
(8*3)+(7*0)+(6*1)+(5*1)+(4*5)+(3*3)+(2*9)+(1*4)=86
86 % 10 = 6
So 301153-94-6 is a valid CAS Registry Number.

301153-94-6Relevant articles and documents

6-s-cis locked analogues of the steroid hormone 1α,25-dihydroxyvitamin D3. Synthesis of novel A-ring stereoisomeric 1,25-dihydroxy-3-epi-19-nor-previtamin D3 derivatives

Diaz, Monica,Ferrero, Miguel,Fernandez, Susana,Gotor, Vicente

, p. 5647 - 5652 (2007/10/03)

Efficient syntheses of A-ring synthons 24 and 32 are described from hydroxy ester 16, which is easily available on a preparative scale from (-)-quinic acid. Key features of the syntheses were (a) the ability to selectively perform desilylations in the presence of p-nitrobenzoate esters and (b) the excellent yield and complete stereospecificity with which the configuration of alcohols 16, 18, and 26 could be inverted under Mitsunobu conditions. Thus, A-ring synthons 24 and 32 were both prepared in 35-38% yield (eight steps) from the common precursor 16. The coupling of A-ring synthons 24 and 32 with the appropriate CD-ring/side chain fragment 7 provides access to novel 6-s-cis locked analogues of steroid hormone 1α,25-dihydroxyvitamin D3: 1α,25-dihydroxy-3-epi-19-nor-previtamin D3 (37) and 1β,25-dihydroxy-3-epi-19-nor-previtamin D3 (38), which are unable to undergo rearrangement to the respective vitamin D form by virtue of the absence of the C-19 methyl group. Compounds 37 and 38 can be used as tools for studying the genomic and nongenomic mechanisms of action of the previtamin form of the hormone 1α,25-dihydroxyvitamin D3.

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