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219858-40-9

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219858-40-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219858-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,8,5 and 8 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 219858-40:
(8*2)+(7*1)+(6*9)+(5*8)+(4*5)+(3*8)+(2*4)+(1*0)=169
169 % 10 = 9
So 219858-40-9 is a valid CAS Registry Number.

219858-40-9Relevant articles and documents

New routes toward drimanes and nor-drimanes from (-)-sclareol

Barrero,Alvarez-Manzaneda,Chahboun,Gonzalez Diaz

, p. 1561 - 1564 (2007/10/03)

New synthetic strategies to prepare natural drimanes and monocarbocyclic terpenoids from (-)-sclareol (2) are reported. The preparation of natural 9,11-drimen-8α-ol (12) and the first enantiospecific synthesis of marine metabolite fulvanin 2 (1) are described.

A new enantiospecific route toward monocarbocyclic terpenoids: Synthesis of (-)- caparrapi oxide

Barrero, Alejandro F.,Alvarez-Manzaneda, Enrique J.,Chahboun, Rachid,Paiz, M. Coral

, p. 9543 - 9544 (2007/10/03)

A new and efficient strategy is described for carrying out the enantiospecific synthesis of monocarbocyclic terpenoids from (-)-sclareol (1). The key steps are the Grob scission of 11-p-toluenesulphonyloxydriman- 7α-ol (2) to give the tobacco seco-sesquiterpene 3 and the Baeyer-Villiger oxidation of 4-[(1'S, 2'S)-2'-formyl-2',6',6'-trimethylcyclohexyl]-2-butanone (4), derived from 3. The first enantiospecific synthesis of (-)-caparrapi oxide (8) based on this methodology is reported.

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