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175522-76-6

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175522-76-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 175522-76-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,5,5,2 and 2 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 175522-76:
(8*1)+(7*7)+(6*5)+(5*5)+(4*2)+(3*2)+(2*7)+(1*6)=146
146 % 10 = 6
So 175522-76-6 is a valid CAS Registry Number.

175522-76-6Relevant articles and documents

Enantioselective Terpene Syntheses by Diels-Alder Reaction of 1-(1-Arylalkoxy)-2-methyl-1,3-butadiene with Isoprene

Zadel, Guido,Rieger, Rainer,Breitmaier, Eberhard

, p. 1343 - 1346 (2007/10/02)

The (R)- and (S)-1-(1-arylalkoxy)-2-methyl-1,3-butadienes 6 undergo cycloadditions with excess isoprene (7) under pressure to yield not only the expected (4S,6R)- and (4R,6S)-trans-carveol (8) with up to 96percent e.e. but also up to 40percent of (R)- and (S)-limonene (9) with up to 93percent e.e.Asymmetric induction is proposed to arise from a transition state involving definite ? stacking of one molecule of isoprenyl ether and two molecules of isoprene.Key Words: (4S,6R)-, (4R,6S)-trans-Carveol / (R)-, (S)-Limonene / Isoprene / Isoprenyl ether / Cycloaddition, diastereo-, enantioselective

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