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73644-87-8

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73644-87-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 73644-87-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,6,4 and 4 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 73644-87:
(7*7)+(6*3)+(5*6)+(4*4)+(3*4)+(2*8)+(1*7)=148
148 % 10 = 8
So 73644-87-8 is a valid CAS Registry Number.

73644-87-8Relevant articles and documents

Lewis Base-Boryl Radicals Enabled the Desulfurizative Reduction and Annulation of Thioamides

Yu, You-Jie,Zhang, Feng-Lian,Cheng, Jie,Hei, Jing-Hao,Deng, Wei-Ting,Wang, Yi-Feng

supporting information, p. 24 - 27 (2018/01/17)

A new protocol for radical transformations of thioamides promoted by Lewis base-boryl radicals is reported. The desulfurizative reduction to access organic amines was enabled utilizing 4-dimethylaminopyridine-BH3 as the boryl radical precursor and PhSH as the polarity reversal catalyst. Alternatively, the chain process for unsaturated thioamides was switched to an annulation reaction using N-heterocyclic carbene-BH3 as the boryl radical precursor and sterically bulky Ph3CSH as the catalyst, allowing for the construction of N-heterocyclic and carbocyclic skeletons.

N-Acyl-N-(4-chlorophenyl)-4-nitrobenzenesulfonamides: Highly selective and efficient reagents for acylation of amines in water

Ebrahimi, Sara,Saiadi, Safoura,Dakhilpour, Simin,Mirsattari, Seyed Nezamoddin,Massah, Ahmad Reza

, p. 95 - 104 (2016/04/26)

A variety of N-acyl-N-(4-chlorophenyl)-4-nitrobenzenesulfonamides (1a-e) were synthesized in one pot from 4-chloroaniline under solvent-free conditions and have been developed as chemoselective N-acylation reagents. Selective protection of primary amines in the presence of secondary amines, acylation of aliphatic amines in the presence of aryl amines, and monofunctionalization of primary-secondary diamines as well as selective N-acylation of amino alcohols using these reagents are described. All of the acylation reactions were carried out in water as a green solvent. High stability and easy preparation of these acylating reagents are other advantages of this method.

Development of new linkers for the formation of aliphatic C-H bonds on polymeric supports

Jung, Kyung Woon,Zhao, Xu-Yang,Janda, Kim D.

, p. 6645 - 6652 (2007/10/03)

Two polymeric linkers, 8 and 11, were prepared in high yields. Attachment of an alkyl group to these linkers was facile, and their cleavage from the MeO-PEG polymer support was accomplished by desulfurization using Raney nickel to yield the new carbon-hydrogen bond product 6. The protocol reported herein allows efficient preparation of new polymeric linkers as well as their possible application to combinatorial libraries.

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