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37892-44-7

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37892-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 37892-44-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,7,8,9 and 2 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 37892-44:
(7*3)+(6*7)+(5*8)+(4*9)+(3*2)+(2*4)+(1*4)=157
157 % 10 = 7
So 37892-44-7 is a valid CAS Registry Number.

37892-44-7Relevant articles and documents

Gold-catalyzed cyclization of 1-(2′-Azidoaryl) propynols: Synthesis of polysubstituted 4-quinolones

Wu, Xiang,Zheng, Lang-Lang,Zhao, Li-Ping,Zhu, Cheng-Feng,Li, You-Gui

, p. 14769 - 14772 (2019/12/24)

An unprecedented gold-catalyzed procedure for the synthesis of polysubstituted 4-quinolones from 1-(2′-Azidoaryl) propynols is described. The reaction undergoes an intramolecular nucleophilic attack of the azide group to the Au-Activated triple bonds in a 6-endo-dig manner and subsequent gold-Assisted expulsion of N2 to furnish an α-imino gold carbene intermediate, which triggers a 1,2-carbon migration and finally is converted to 2,3-disubstituted 4-quinolone.

An In-depth Study of the Azidobenzophenone-Anthranil-Acridone Transformation

Hawkins, David G.,Meth-Cohn, Otto

, p. 2077 - 2087 (2007/10/02)

The title transformation, particularly the conversion of anthranils into acridones, is shown to be critically sensitive to temperature, solvent, substituent, and metal catalysts.Thus the conversion of 3-(p-tolyl)anthranil into an acridone gives a ratio of 2-and 3-methyl derivatives varying from 0.6:1 to 4.7:1 with changing temperature and solvent.In other similar thermolyses, solvents (e.g. 1,2,4-trichlorobenzene) were incorporated into the product and traces of metals and their derivatives had a dramatic effect on the rate and course of the reaction.The most effective catalysts were iron powder and aluminium acetylacetonate. 3-(2,6-Disubstituted phenyl)anthranils gave acridones in which the substituents were either lost or rearranged onto N or C, the last cases involving sequential -sigmatropic shifts. 3-Thienylanthranils gave related thienoquinolones on thermolysis; again the reaction were very sensitive to catalysis.Blocked thienylanthranils also gave rearrangement products, but the non-aromatic intermediates could be isolated.

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