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6840-23-9

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6840-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6840-23-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,8,4 and 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6840-23:
(6*6)+(5*8)+(4*4)+(3*0)+(2*2)+(1*3)=99
99 % 10 = 9
So 6840-23-9 is a valid CAS Registry Number.

6840-23-9Relevant articles and documents

C-P bond formation of cyclophanyl-, and aryl halides: Via a UV-induced photo Arbuzov reaction: A versatile portal to phosphonate-grafted scaffolds

Br?se, Stefan,Hassan, Zahid,Nieger, Martin,O?wald, Simon,Zippel, Christoph

, p. 3309 - 3312 (2022/02/11)

A new versatile method for the C-P bond formation of (hetero)aryl halides with trimethyl phosphite via a UV-induced photo-Arbuzov reaction, accessing diverse phosphonate-grafted arenes, heteroarenes and co-facially stacked cyclophanes under mild reaction

Copper-catalyzed coupling reaction of arylhydrazines and trialkylphosphites

Chen, Sheng-Yan,Zeng, Run-Sheng,Zou, Jian-Ping,Asekun, Olayinka Taiwo

, p. 1449 - 1453 (2014/03/21)

A novel CuO-catalyzed coupling reaction of arylhydrazines with trialkyl phosphites to afford arylphosphonates is described. The reaction proceeded at 80 C in air without external reductants, oxidants, and ligands.

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