40337-07-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40337-07-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,3,3 and 7 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 40337-07:
(7*4)+(6*0)+(5*3)+(4*3)+(3*7)+(2*0)+(1*7)=83
83 % 10 = 3
So 40337-07-3 is a valid CAS Registry Number.
40337-07-3Relevant articles and documents
Synthesis and reactivity of 2-(furan-2-yl)benzo[e][1,3]benzothiazole
Aleksandrov,El’chaninov
, p. 1716 - 1720 (2017)
N-(1-Naphthyl)furan-2-carboxamide was synthesized by the coupling of naphthalen-1-amine with furan-2-carbonyl chloride in propan-2-ol and then treated with excess P2S5 in anhydrous toluene to obtain the corresponding thioamide. The latter was oxidized wit