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67571-01-1

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67571-01-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 67571-01-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,5,7 and 1 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 67571-01:
(7*6)+(6*7)+(5*5)+(4*7)+(3*1)+(2*0)+(1*1)=141
141 % 10 = 1
So 67571-01-1 is a valid CAS Registry Number.

67571-01-1Downstream Products

67571-01-1Relevant articles and documents

A diversity oriented synthesis of 2,10-dioxo-10H-1,2,3,4,4a,5-hexahydropyridazino[3,2-b]quinazolines

Schuler, Elisabeth,Juanico, Nacho,Teixidó, Jordi,Michelotti, Enrique L.,Borrell, José I.

, p. 161 - 173 (2006)

A parallel method for the synthesis of the title compounds is described. Thus, methyl anthranilates (5) are transformed into 2-aminobenzohydrazides (3) which were treated with 4-oxo acids (4) to afford in high yields and acceptable purity of piridazino[3,2-b]quinazolines (1). Compounds (1) present four diversity centers (R1, R2, R3, and R4). The range of chemically acceptable substituents at each center has been evaluated. The isolation of a possible intermediate in the formation of 1, which presents an amino structure (10), has allowed proposing a complete mechanistic rationalization for the formation of structures (1).

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