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345-53-9

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345-53-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 345-53-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,4 and 5 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 345-53:
(5*3)+(4*4)+(3*5)+(2*5)+(1*3)=59
59 % 10 = 9
So 345-53-9 is a valid CAS Registry Number.

345-53-9Relevant articles and documents

Preparation of 3,4-Substituted-5-Aminopyrazoles and 4-Substituted-2-Aminothiazoles

Havel, Stepan,Khirsariya, Prashant,Akavaram, Naresh,Paruch, Kamil,Carbain, Benoit

, p. 15380 - 15405 (2019/01/04)

3,4-Substituted-5-aminopyrazoles and 4-substituted-2-aminothiazoles are frequently used intermediates in medicinal chemistry and drug discovery projects. We report an expedient flexible synthesis of 3,4-substituted-5-aminopyrazoles (35 examples), based on palladium-mediated α-arylation of β-ketonitriles with aryl bromides. A library of 4-substituted-2-aminothiazoles (21 examples) was assembled by a sequence employing Suzuki coupling of newly prepared, properly protected pinacol ester and MIDA ester of 4-boronic acid-2-aminothiazole with (hetero)aryl halides.

Pyrazolotriazines as inhibitors of nucleases

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Paragraph 0045; 0046; 0047; 0048, (2016/01/12)

The invention provides compounds represented by the structural formula (1): wherein R1, R2, R3 and R4 are as defined in the claims. The compounds are inhibitors of nucleases, and are useful in particular in a method of treatment and/or prevention of proliferative diseases, neurodegenerative diseases, and other genomic instability associated diseases.

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