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82185-40-8

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82185-40-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 82185-40-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,2,1,8 and 5 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 82185-40:
(7*8)+(6*2)+(5*1)+(4*8)+(3*5)+(2*4)+(1*0)=128
128 % 10 = 8
So 82185-40-8 is a valid CAS Registry Number.

82185-40-8Relevant articles and documents

One-pot synthesis ofN-substituted benzannulated triazolesviastable arene diazonium salts

Faggyas, Réka J.,McGrory, Rochelle,Sutherland, Andrew

supporting information, p. 6127 - 6140 (2021/07/21)

A mild and effective one-pot synthesis of 1,2,3-benzotriazin-4(3H)-ones and benzothiatriazine-1,1(2H)-dioxide analogues has been developed. The method involves the diazotisation and subsequent cyclisation of 2-aminobenzamides and 2-aminobenzenesulfonamidesviastable diazonium salts, prepared using a polymer-supported nitrite reagent andp-tosic acid. The transformation was compatible with a wide range of aryl functional groups and amide/sulfonamide-substituents and was used for the synthesis of pharmaceutically important targets. The synthetic utility of the one-pot diazotisaton-cyclisation process was further demonstrated with the preparation of an α-amino acid containing 1,2,3-benzotriazin-4(3H)-one.

NaNO2/I2 as an alternative reagent for the synthesis of 1,2,3-benzotriazin-4(3H)-ones from 2-aminobenzamides

Barak, Dinesh S.,Mukhopadhyay, Sushobhan,Dahatonde, Dipak J.,Batra, Sanjay

supporting information, p. 248 - 251 (2019/01/04)

An efficient transformation of 2-aminobenzamides to 1,2,3-benzotriazin-4(3H)-ones in the presence of sodium nitrite (NaNO2) and Iodine (I2) is described. The reaction is proposed to proceed via formation of nitrosyl halide that induces nitrosylation of the amino group of 2-aminobenzamide leading to diazotization followed by intramolecular cyclization.

General, Mild, and Metal-Free Synthesis of Phenyl Selenoesters from Anhydrides and Their Use in Peptide Synthesis

Temperini, Andrea,Piazzolla, Francesca,Minuti, Lucio,Curini, Massimo,Siciliano, Carlo

, p. 4588 - 4603 (2017/05/12)

A mild, practical, and simple procedure for phenyl selenoesters synthesis from several anhydrides and diphenyl diselenide was developed. This transition-metal-free method provides a straightforward entry to storable Fmoc-amino acid selenoesters which are effective chemoselective acylating reagents. An application to oligopeptide synthesis was illustrated.

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