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19890-07-4

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19890-07-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19890-07-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,9 and 0 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 19890-07:
(7*1)+(6*9)+(5*8)+(4*9)+(3*0)+(2*0)+(1*7)=144
144 % 10 = 4
So 19890-07-4 is a valid CAS Registry Number.

19890-07-4Relevant articles and documents

Liquid phase acetoxylation of α-pinene over Amberlyst-70 ion-exchange resin

Golets,Ajaikumar,Blomberg,Grundberg,W?rn?,Salmi,Mikkola

scheme or table, p. 43 - 50 (2012/10/18)

Heterogeneously-catalyzed and solvent-catalyzed liquid phase acetoxylation of α-pinene with acetic acid acting as both a solvent and a reagent was studied. Both solvent-catalyzed and catalytic experiments were carried out and various reaction conditions were studied. The influence of temperature, pressure, solvent and gas milieu were taken into account. Bornyl, fenchyl, verbenyl as well as α-terpinyl acetates, limonene, camphene and γ-terpinene were found among reaction products. The addition of the catalyst allowed for maximization of the yield of bornyl acetate. The predominant products obtained were α-terpinyl, verbenyl and bornyl acetates. The reaction pathways were identified and evaluated. The aim of this work was to study the feasibility of batch acetoxylation of α-pinene. The analysis of the complex product distribution is not trivial and, consequently, resolving the reaction network was important. The optimized reaction conditions were searched for aiming at an efficient conversion of α-pinene to a mixture of valuable products.

INVESTIGATION OF THE SYNTHESIS OF VERBENYL COMPOUNDS EFFECTIVE ATTRACTANTS OF COCKROACH SPECIES, BY ACYLOXYLATION OF α-PINENE

Vinczer, Peter,Kajtar-Peredy, Maria,Juvancz, Zoltan,Novak, Lajos,Szantay, Csaba

, p. 1719 - 1730 (2007/10/02)

The synthesis of verbenyl acetate (Ia) and propionate (Ib) was inestigated by acyloxylation of α-pinene with lead(IV) acetate (LTA), lead(IV) propionate (LTP), mercury(II) acetate (MA) and iodosobenzene diacetate (IBDA) in neutral and acidic medium.The neutral medium is better for the formation of Ia and Ib, because the acidic medium helps the opening of cyclobutane ring of α-pinene.These methods can be used for large scale preparation of insect attractants to cockroach species (Blatella germanica, Blatella orientalis and Periplaneta americana).

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