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28687-71-0

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28687-71-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28687-71-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,6,8 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 28687-71:
(7*2)+(6*8)+(5*6)+(4*8)+(3*7)+(2*7)+(1*1)=160
160 % 10 = 0
So 28687-71-0 is a valid CAS Registry Number.

28687-71-0Relevant articles and documents

Isoxazoles and isoxazolines by 1,3-dipolar cycloaddition: Base-catalysed condensation of primary nitro compounds with dipolarophiles

Machetti, Fabrizio,Cecchi, Luca,Trogu, Elena,De Sarlo, Francesco

, p. 4352 - 4359 (2007)

1,4-Diazabicyclo[2.2.2]octane (DABCO) or other suitable N-bases cause primary activated nitro compounds to condense with alkenes to yield isoxazolines or with alkynes to give isoxazoles. As the molar ratio of the base with respect to the dipolarophile dec

Electrocyclic Ring-Opening of 1,2,4-Oxadiazole[4,5-a]piridinium Chloride: a New Route to 1,2,4-Oxadiazole Dienamino Compounds

Carella, Stefano,Memeo, Misal Giuseppe,Quadrelli, Paolo

, p. 1209 - 1221 (2019/10/19)

1,2,4-Oxadiazole[4,5-a]piridinium chloride adds nucleophiles to undergo electrocyclic ring opening affording 1,2,4-oxadiazole dienamino derivatives. These pyridinium salts represent a special class of Zincke salts that are prone to rearrange when treated

Hypervalent iodine-catalyzed cycloaddition of nitrile oxides to alkenes

Xiang, Changbin,Li, Tingting,Yan, Jie

supporting information, p. 682 - 688 (2014/01/17)

A new and convenient method for preparation of isoxazolines was developed by a catalytic cycloaddition of nitrile oxides generated in situ from aldoximes to alkenes in the presence of a catalytic amount of iodobenzene. In this protocol, iodobenzene was fi

Oxidation of oximes to nitrile oxides with hypervalent iodine reagents

Mendelsohn, Brian A.,Lee, Shelley,Kim, Simon,Teyssier, Florian,Aulakh, Virender S.,Ciufolini, Marco A.

supporting information; experimental part, p. 1539 - 1542 (2009/08/07)

Iodobenzene diacetate in MeOH containing a catalytic amount of TFA efficiently oxidizes aldoximes to nitrile oxides. The latter may be trapped in situ with olefins in a bimolecular or an intramolecular mode. The new method enables the execution of tandem oxidative dearomatization of phenols/intramolecular nitrile oxide cycloaddition sequences leading to useful synthetic intermediates.

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