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143883-01-6

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143883-01-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143883-01-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,8,8 and 3 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 143883-01:
(8*1)+(7*4)+(6*3)+(5*8)+(4*8)+(3*3)+(2*0)+(1*1)=136
136 % 10 = 6
So 143883-01-6 is a valid CAS Registry Number.

143883-01-6Relevant articles and documents

Triethyl phosphite mediated synthesis of indazoloquinazolinoperimidines, oxadiazoloindazoles and thiadiazoloindazoles

Reddy, V Rama Kishan,Reddy, P S N,Ratnam, C V

, p. 499 - 502 (2007/10/02)

2-(2-Aminophenyl)perimidine (1) on treatment with 2-nitrobenzaldehydes (2) in acetic acid gives 5,6-dihydro-6-(2-nitroaryl)quinazolinoperimidines (4) which on permanganate oxidation yield 6-(2-nitroaryl)quinazolinoperimidines (5). 5-on triethylphosphite (TEP) mediated deoxygenative cyclisation afford indazoloquinazolinoperimidines (6).Similarly, 5-aryl-2-(2-nitrophenyl)oxadiazoles (9) and 2-arylamino-5-(2-nitrophenyl)thiadiazoles (14) on treatment with TEP give 2-aryloxadiazoloindazoles (10) and2-(N-ethylarylamino)thiadiazoloindazoles (16) respectively.

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