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19324-77-7

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19324-77-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19324-77-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,3,2 and 4 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 19324-77:
(7*1)+(6*9)+(5*3)+(4*2)+(3*4)+(2*7)+(1*7)=117
117 % 10 = 7
So 19324-77-7 is a valid CAS Registry Number.

19324-77-7Relevant articles and documents

Iodine-Promoted Metal-Free Aromatization: Synthesis of Biaryls, Oligo p-Phenylenes and A-Ring Modified Steroids

Domingo, Victoriano,Prieto, Consuelo,Castillo, Alexis,Silva, Lucia,Quílez Del Moral, José F.,Barrero, Alejandro F.

supporting information, p. 3359 - 3364 (2015/11/03)

We describe efficient procedures based on the use of iodine for the synthesis of biaryls from arylcyclohexenols or arylcyclohexanols using sub-stoichiometric/catalytic iodine and dimethyl sulfoxide (DMSO) as oxidant. Heteroarylcyclohexanols also produced the corresponding biaryl products. It was proven that biphenyl can also be efficiently obtained when the quantity of iodine was reduced to 0.05 equiv. The method is compatible with different functional groups in the aromatic ring (either electron-donating or electron-withdrawing groups). For substrate scope, apart from cyclohexanone and cyclohexenone, some substituted cyclohexanones were also used to synthesize the starting arylcyclohexanols. The process was applied to the synthesis of oligo p-phenylenes and A-ring aromatized steroids, where the combined use of I2/DMSO not only provoked the necessary migration of the methyl group at C-10, but also further extended the conjugation.

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