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42731-71-5

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42731-71-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42731-71-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,7,3 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42731-71:
(7*4)+(6*2)+(5*7)+(4*3)+(3*1)+(2*7)+(1*1)=105
105 % 10 = 5
So 42731-71-5 is a valid CAS Registry Number.

42731-71-5Relevant articles and documents

Conventional and microwave-assisted solvent-free synthesis of fused [1,2,5]thiadiazolo[3,4-b]quinoxaline-2,2-dioxide derivatives

Dehamchia, Mohamed,Regainia, Zine

, p. 242 - 249 (2013)

A simple, highly efficient and environmentally friendly procedure for the condensation of ο$-phenylenediamine with 2,5-dialkyl-1,2,5- thiadiazolidine-3,4-dione-1,1-dioxides via two microwave-assisted reactions is described. These compounds were also prepared via a conventional heating method to provide a comparison with the microwave-assisted irradiation reaction protocol. The structures of the synthesized compounds were confirmed using infrared, 1H NMR and mass spectral analysis.

Ultrasonic assisted green protocol for the synthesis of sulfamides

Grib, Ismahene,Belhani, Billel,Bechlem, Khaoula,Bouasla, Radia,Aouf, Nour-Eddine,Berredjem, Malika

, p. 827 - 830 (2017/07/22)

An improved environmentally benign method for synthesis of sulfamides under focused ultrasound irradiation and under solvent-free and catalyst-free conditions has been carried out by the reaction of amines or amino esters with sulfuryl chloride. This approach allows the synthesis of products in excellent yields and in short reaction time.

Vicinal Diamination of Arenes with Domino Aryne Precursors

Li, Lu,Qiu, Dachuan,Shi, Jiarong,Li, Yang

supporting information, p. 3726 - 3729 (2016/08/16)

Vicinal diamination of domino aryne precursors was achieved with sulfamides. The reaction proceeds through a two-aryne pathway, accepting two N-nucleophiles at the 1,2-positions of an arene ring. Symmetrical and unsymmetrical diaminobenzenes were readily obtained.

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