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28131-24-0

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28131-24-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 28131-24-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,1,3 and 1 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 28131-24:
(7*2)+(6*8)+(5*1)+(4*3)+(3*1)+(2*2)+(1*4)=90
90 % 10 = 0
So 28131-24-0 is a valid CAS Registry Number.

28131-24-0Relevant articles and documents

Photochemical regioselective C(sp3)-H amination of amides using N-haloimides

Pan, Lei,Elmasry, Joseph,Osccorima, Tomas,Cooke, Maria Victoria,Laulhé, Sébastien

supporting information, p. 3389 - 3393 (2021/05/07)

A metal-free regioselective C(sp3)-H amination of amides using N-haloimides in the presence of lithium tert-butoxide and visible light is presented herein. This photoexcited approach is straightforward, and it aminates a wide variety of amides under mild conditions without the use of photocatalysts, external radical initiators, or oxidants. A halogen-bonded intermediate between the tert-butoxide base and the N-haloimide is proposed to be responsible for the increased photoreactivity. Calculations show that the formation of this electron donor-acceptor complex presents an exergonic energy profile.

Amide Effects in C?H Activation: Noncovalent Interactions with L-Shaped Ligand for meta Borylation of Aromatic Amides

Bisht, Ranjana,Hoque, Md Emdadul,Chattopadhyay, Buddhadeb

supporting information, p. 15762 - 15766 (2018/11/10)

A new concept for the meta-selective borylation of aromatic amides is described. It has been demonstrated that while esters gave para borylations, amides lead to meta borylations. For achieving high meta selectivity, an L-shaped bifunctional ligand has been employed and engages in an O???K noncovalent interaction with the oxygen atom of the moderately distorted amide carbonyl group. This interaction provides exceptional control for meta C?H activation/borylation.

Nickel-catalyzed C-N bond reduction of aromatic and benzylic quaternary ammonium triflates

Yi, Yuan-Qiu-Qiang,Yang, Wen-Cheng,Zhai, Dan-Dan,Zhang, Xiang-Yu,Li, Shuai-Qi,Guan, Bing-Tao

, p. 10894 - 10897 (2016/09/09)

A nickel-catalyzed, efficient C-N bond reduction of aromatic and benzylic ammonium triflates has been developed using sodium isopropoxide as a reducing agent. The high efficiency, mild conditions, and good compatibility with various substituents made this method an effective supplement to the current catalytic hydrogenation reactions. Combining this reductive deamination reaction with directed aromatic functionalization reactions, a powerful strategy for regioselective functionalization of arenes was demonstrated using dialkylamine groups as traceless directing groups.

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