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42970-52-5

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42970-52-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42970-52-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,7 and 0 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 42970-52:
(7*4)+(6*2)+(5*9)+(4*7)+(3*0)+(2*5)+(1*2)=125
125 % 10 = 5
So 42970-52-5 is a valid CAS Registry Number.

42970-52-5Relevant articles and documents

Solvent-free and transition metal catalyst-free synthesis of indolo[1,2-f]phenanthridine from 6-chlorophenanthridine

Ageshina, A. A.,Asachenko, A. F.,Drokin, E. A.,Lysenko, A. N.,Minaeva, L. I.,Nechaev, M. S.,Rzhevskiy, S. A.,Sterligov, G. K.,Topchiy, M. A.

, p. 479 - 483 (2022/05/02)

A new easily scalable synthesis of the important for materials chemistry indolo[1,2-f]phenanthridine from commercially available 6-chlorophenanthridine was developed. The suggested transition metal catalyst-free and solvent-free procedure is more ecologically friendly and cost efficient then the known methods. The yields of indolo[1,2-f]phenanthridine synthesized from 6-chlorophenanthridine in three steps were 20% and 26% if the cyclization was carried out solvent-free and in THF in the presence of lithium 2,2,6,6-tetramethylpiperidide, respectively.

Nickel-Catalyzed Denitrogenative Annulation of 1,2,3-Benzotriazin-4-(3H)-ones with Benzynes for Construction of Phenanthridinone Scaffolds

Thorat, Vijaykumar H.,Upadhyay, Nitinkumar Satyadev,Murakami, Masahiro,Cheng, Chien-Hong

supporting information, p. 284 - 289 (2017/12/26)

The synthesis of phenanthridinones via denitrogenative annulation of 1,2,3-benzotriazin-4-(3H)-ones with arynes catalysed by Ni(0)/dppm was successfully developed. A variety of phenanthridinones were prepared in good to excellent yields. Based on this method, nature product, N-methylcrinasidine, was synthesized. (Figure presented.).

Practical Synthesis of Phenanthridinones by Palladium-Catalyzed One-Pot C-C and C-N Coupling Reaction: Extending the Substrate Scope to o-Chlorobenzamides

Liu, Hailong,Han, Weibiao,Li, Chun,Ma, Zhiyong,Li, Ruixiang,Zheng, Xueli,Fu, Haiyan,Chen, Hua

supporting information, p. 389 - 393 (2016/02/18)

A highly efficient construction of phenanthridinone derivatives from o-halobenzamides was developed by using a phosphine-free palladium catalyst in N,N-dimethylacetamide. The domino reaction proceeds through a sequential C-C and C-N bond-formation process in one pot. This protocol exhibits broad substrate scope and affords a series of phenanthridinones in up to 93 % yield. Importantly, the protocol could also be applied for the less reactive o-chlorobenzamides. The approach constitutes the first example of the synthesis of phenanthridinones from this kind of substrate. Moreover, the success of a gram-scale reaction demonstrated that this operationally simple process is scalable.

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