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91897-73-3

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91897-73-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91897-73-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,8,9 and 7 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 91897-73:
(7*9)+(6*1)+(5*8)+(4*9)+(3*7)+(2*7)+(1*3)=183
183 % 10 = 3
So 91897-73-3 is a valid CAS Registry Number.

91897-73-3Relevant articles and documents

Synthesis of cis-2,6-tetrahydropyran-4-one via diastereoselectively intramolecular cyclization of β-hydroxy allyl ketone

Lee, Adam Shih-Yuan,Lin, Li-Shin,Chang, Yu-Ting

, p. 3915 - 3919 (2012/07/14)

A series of cis-2,6-tetrahydropyran-4-ones was synthesized from the intramolecular cyclization reaction of β-hydroxy allyl ketones in the presence of Me3SiOTf as catalyst. The β-hydroxy allyl ketone was prepared from allylation reaction with β-hydroxynitrile without protection of hydroxy functionality under the Barbier-type reaction condition.

Stereoselective double friedel-crafts alkylation of indoles with divinyl ketones

Silvanus, Andrew C.,Heffernan, Stephen J.,Liptrot, David J.,Kociok-Koehn, Gabriele,Andrews, Benjamin I.,Carbery, David R.

supporting information; experimental part, p. 1175 - 1178 (2009/08/07)

A tandem double Friedel-Crafts reaction of indoles and nonsymmetrical divinyl ketones has been achieved. The tandem reaction forms complex [6-5-7]-tricyclic indoles in excellent yields. The reaction is completely regioselective and offers high levels of s

Asymmetric Ni-catalyzed conjugate allylation of activated enones

Sieber, Joshua D.,Morken, James P.

, p. 4978 - 4983 (2008/09/20)

The nickel-catalyzed enantioselective addition of allylboronic acid pinacol ester, allylB(pin), is described. This reaction is highly effective with dialkylidene ketones and favors the allylation of the benzylidene site in nonsymmetric substrates. The rea

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