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40746-62-1

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40746-62-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40746-62-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,7,4 and 6 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 40746-62:
(7*4)+(6*0)+(5*7)+(4*4)+(3*6)+(2*6)+(1*2)=111
111 % 10 = 1
So 40746-62-1 is a valid CAS Registry Number.

40746-62-1Downstream Products

40746-62-1Relevant articles and documents

Dehydrative Beckmann rearrangement and the following cascade reactions

Liu, Yinghui,Wei, Yongjiao,Xie, Lan-Gui

, (2021/11/16)

The Beckmann rearrangement has been predominantly studied for the synthesis of amide and lactam. By strategically using the in situ generated Appel's salt or Mitsunobu's zwitterionic adduct as the dehydrating agent, a series of Beckmann rearrangement and following cascade reactions have been developed herein. The protocol allows the conversion of various ketoximes into amide, thioamide, tetrazole and imide products in modular procedures. The generality and tolerance of functionalities of this method have been demonstrated.

Stereospecific synthesis of 1,5-disubstituted tetrazoles from ketoximes via a Beckmann rearrangement facilitated by diphenyl phosphorazidate

Ishihara, Kotaro,Shioiri, Takayuki,Matsugi, Masato

supporting information, p. 1295 - 1298 (2019/04/13)

A novel method for the stereospecific synthesis of 1,5-disubstituted tetrazoles from ketoximes via the Beckmann rearrangement was developed using diphenyl phosphorazidate (DPPA) as both the oxime activator and azide source. Various ketoximes were transformed into the corresponding 1,5-disubstituted tetrazoles with exclusive trans-group migration and no E-Z isomerization of the ketoxime. This method enables the preparation of 1,5-disubstituted tetrazoles without using toxic or explosive azidation reagents.

Efficient uncatalyzed conversion of primary and secondary thioamides into 1-substituted, 5-substituted, 1, 5-disubstituted and annulated tetrazoles

El-Ahl, Abdel-Aziz S.,Amer, Fatty A.,Elbeheery, Akram H.

experimental part, p. 2226 - 2235 (2012/03/26)

Unprecedented high-yield simple and mild conversion of primary aliphatic and aromatic thioamides into 5-substituted tetrazoles on treatment with a combination of tetrachlorosilane and sodium azide in refluxing acetonitrile has been achieved. Secondary acyclic, cyclic, and heterocyclic thioamides could also be transformed in high yields into 1-substituted, 1,5-disubstituted, or annulated tetrazoles under the same reaction condition. Copyright Taylor & Francis Group, LLC.

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