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157552-28-8

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157552-28-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157552-28-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,5,5 and 2 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 157552-28:
(8*1)+(7*5)+(6*7)+(5*5)+(4*5)+(3*2)+(2*2)+(1*8)=148
148 % 10 = 8
So 157552-28-8 is a valid CAS Registry Number.

157552-28-8Downstream Products

157552-28-8Relevant articles and documents

Functionality of γ- and δ-pyrorenes. Synthesis and study of the reactivity of peroxide compounds

Campagnole, Monique,Bourgeois, Marie-Josèphe,Montaudon, Evelyne

, p. 1165 - 1171 (2007/10/03)

The photooxygenation of γ- and δ-pyronenes, performed for the first time, affords, as expected, a hydroperoxide, a hydroperoxyperoxide, and an endoperoxide, respectively. The reactivity of these peroxides is studied. They lead to mono-, di- or trifunctional compounds. Most of them are new and could be useful to synthesize molecules with potential sweet-smelling or therapeutic properties.

Epoxy-pyronene: Obtention of cyclocitrals from ionones and precursor of new terpenic compounds

Marc,Soulet,Serramedan,Delmond

, p. 3381 - 3388 (2007/10/02)

The selective obtention of epoxy-pyronene from δ-pyronene has been realized using metachloroperbenzoic acid. The isomerization of this epoxidic compound with Lewis and protonic acids and on active alumina has been studied leading to cyclocitrals. Ionones are obtained from epoxy-pyronene by homologation with various C3 units, in the presence of paratoluenesulfonic acid in order to obtain β-cyclocitral in situ. New terpenic compounds with the cyclogeranyl skeleton were obtained from epoxy-pyronene by reduction followed by homologation.

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