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56119-89-2

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56119-89-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56119-89-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,1,1 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 56119-89:
(7*5)+(6*6)+(5*1)+(4*1)+(3*9)+(2*8)+(1*9)=132
132 % 10 = 2
So 56119-89-2 is a valid CAS Registry Number.

56119-89-2Relevant articles and documents

Preparation method for pyrazole

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Paragraph 0011; 0012; 0013; 0014; 0015; 0016; 0129; 0130, (2017/08/26)

The invention relates to a preparation method for pyrazole, belonging to the field of organic chemistry. The preparation method disclosed in the invention realizes preparation of pyrazole through a cyclization reaction of N-alkylated phenylsulfonylhydrazone with terminal alkyne. The reaction has good function group tolerance and high yield and is applicable to a wide range of substrates.

Regioselective synthesis of 1,3,5-Trisubstituted Pyrazoles from N-Alkylated Tosylhydrazones and terminal Alkynes

Kong, Yuanfang,Tang, Meng,Wang, Yun

, p. 576 - 579 (2014/04/03)

An efficient synthesis of 1,3,5-trisubstituted pyrazoles from Nalkylated tosylhydrazones and terminal alkynes was developed. The protocol was applied to a wide range of substrates and demonstrated excellent tolerance to a variety of substituents, includin

Regioselective three-component synthesis of highly fluorescent 1,3,5-trisubstituted pyrazoles

Willy, Benjamin,Mueller, Thomas J. J.

experimental part, p. 4157 - 4168 (2009/05/11)

3,5-Disubstituted and 1,3,5-trisubstituted pyrazoles are readily synthesized from acyl chlorides, terminal alkynes, and hydrazines by a consecutive one-pot three-component Sonogashira coupling/Michael addition/cyclocondensation sequence in good to excelle

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