28140-93-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28140-93-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,1,4 and 0 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 28140-93:
(7*2)+(6*8)+(5*1)+(4*4)+(3*0)+(2*9)+(1*3)=104
104 % 10 = 4
So 28140-93-4 is a valid CAS Registry Number.
InChI:InChI=1/C13H8N2S/c14-8-9-5-6-11-13(7-9)16-12-4-2-1-3-10(12)15-11/h1-7,15H
28140-93-4Relevant articles and documents
A Facile Synthesis of Cyanophenothiazines
Marivingt-Mounir, Cecile,Mettey, Yvette,Vierfond, Jean-Michel
, p. 843 - 845 (2007/10/03)
A one-pot synthesis of 1, 3 and 4-cyanophenothiazines and a two-step approach to 2-cyanoisomer have been developed. The condensation of 2-aminobenzenethiol and 2,3 or 3,4-dihalogenobenzonitriles followed by Smiles rearrangement or by intramolecular aromatic substitution gave the desired ring systmes.
