81581-73-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81581-73-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,8 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81581-73:
(7*8)+(6*1)+(5*5)+(4*8)+(3*1)+(2*7)+(1*3)=139
139 % 10 = 9
So 81581-73-9 is a valid CAS Registry Number.
81581-73-9Relevant academic research and scientific papers
SYNTHESIS OF 1,2-DIPHENYLPYRROLOQUINAZOLINES
Horiuchi, Jiroh,Yamato, Masatoshi,Katagiri, Nobuya,Kato, Tetsuzo
, p. 249 - 252 (2007/10/02)
Heating of 2-aminobenzamide (1) with benzoin (4) in the presence of anhydrous zinc chloride gave 2-(1-benzoylbenzylamino)benzamide (5a) which, on treatment with acetic anhydride, was transformed to 1,2-diphenyl-4,5-dihydropyrroloquinazolin-5-one (6
