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19857-37-5

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19857-37-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19857-37-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,5 and 7 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 19857-37:
(7*1)+(6*9)+(5*8)+(4*5)+(3*7)+(2*3)+(1*7)=155
155 % 10 = 5
So 19857-37-5 is a valid CAS Registry Number.

19857-37-5Downstream Products

19857-37-5Relevant articles and documents

Cu/Pd-catalyzed C-2-H arylation of quinazolin-4(3H)-ones with (hetero)aryl halides

Godeau, Julien,Harari, Marine,Laclef, Sylvain,Deau, Emmanuel,Fruit, Corinne,Besson, Thierry

, p. 7705 - 7717 (2015)

The regiospecific C-2-H arylation of N-3-substituted quinazolin-4(3H)-ones with a wide range of aryl or (hetero)aryl halides under microwave irradiation was studied. A ligand-dependent palladium/copper bicatalytic system was developed and allowed direct c

Complementary Reactivity in Selective Radical Processes: Electrochemistry of Oxadiazolines to Quinazolinones

Hwang, Ho Seong,Cho, Eun Jin

supporting information, p. 5148 - 5152 (2021/07/19)

Electrochemistry has recently emerged as a sustainable approach for efficiently generating radical intermediates utilizing eco-friendly electric energy. An electrochemical process was developed to transform 1,2,4-oxadiazolines under mild conditions. The electrochemical N-O bond cleavage at a controlled oxidation potential led to the selective synthesis of quinazolinone derivatives that could not be obtained by photocatalytic radical processes, indicating complementary reactivities in radical processes. The electrochemical reaction pathways were fully revealed by density functional theory-based investigations.

Synthesis of quinazolin-4(3H)-ones via electrochemical decarboxylative cyclization of α?keto acids with 2-aminobenzamides

Tian, Qing,Wei, Yu,Xu, Liang,Zhang, Jinli

, (2021/01/05)

Herein, an environmentally benign electrochemical protocol has been disclosed for the synthesis of quinazolin-4(3H)-one derivatives from readily available α?keto acids and 2-aminobenzamides. This decarboxylative cyclization process proceeds conveniently in the absence of any homogeneous metal catalysts, bases, or external oxidants. This protocol also features CO2 by-products, mild reaction conditions (room temperature and air atmosphere), and a wide variety of substrate scope, including an array of 2,3-disubstituted quinazolinone products.

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