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5834-42-4

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5834-42-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5834-42-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,8,3 and 4 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 5834-42:
(6*5)+(5*8)+(4*3)+(3*4)+(2*4)+(1*2)=104
104 % 10 = 4
So 5834-42-4 is a valid CAS Registry Number.

5834-42-4Relevant articles and documents

Sequential Sonogashira/intramolecular aminopalladation/cross-coupling ofortho-ethynyl-anilines catalyzed by a single palladium source: rapid access to 2,3-diarylindoles

Wang, Jiwei,Wang, Gendi,Cheng, Xiang,Liu, Ye,Zhang, Jun

, p. 1329 - 1333 (2021/02/26)

We have developed a practical and efficient one-pot protocol for the synthesis of 2,3-diarylindolesviaPd-catalyzed bis-arylative cyclization of variouso-ethynylanilines with aryl iodides. Mechanism studies showed that a Pd-catalyzed Sonogashira reaction took place firstly, giving an internal alkyne intermediate, which subsequently underwent intramolecular aminopalladation/cross-coupling to give access to 2,3-diarylindoles. The present methodology exhibits a broad substrate scope, producing various 2,3-diaryl indoles bearing two different aryl groups.

Arylation synthesis method for novel five-membered aromatic heterocycle and aromatic-ring five-membered aromatic heterocycle

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Paragraph 0112-0115; 0204-0207, (2018/07/07)

The invention belongs to the technical field of organic synthesis and in particular relates to an arylation synthesis method for a five-membered aromatic heterocycle or an aromatic-ring five-memberedaromatic heterocycle under the participation of an arylhydrazine derivative serving as a novel arylation reagent. The method comprises the steps: adding a raw material and aroyl hydrazine into a reactor, and carrying out a reaction at 60-100 DEG C for 8-24h under the condition that an oxidant and a transition metal catalyst are added; after the reaction is ended, carrying out suction filtration, extracting a filtrate by using ethyl acetate, carrying out drying to obtain a crude product of a target compound, and carrying out column chromatography on silica gel to obtain a pure product of the target compound. The arylation synthesis method for the five-membered aromatic heterocycle or the aromatic-ring five-membered aromatic heterocycle is scientific and reasonable and has the advantages such as simplicity and convenience in operation, relatively high yield and simplicity in amplification and purification.

Palladium-Catalyzed Synthesis of Indoles and Isoquinolines with in Situ Generated Phosphinimine

Zhou, Qi,Zhang, Zhikun,Zhou, Yujing,Li, Shichao,Zhang, Yan,Wang, Jianbo

, p. 48 - 56 (2017/04/26)

A palladium-catalyzed synthesis of polysubstituted indoles and isoquinolines through the coupling of aryl bromides with 2-alkynyl arylazides or 2-alkynyl benzylazides has been developed. This method provides straightforward access to indoles and isoquinolines with high efficiency and excellent functional group compatibility. In this transformation, the iminophosphorane in situ generated from azides is served as the nucleophile that attacks the alkyne moiety in the cyclization process.

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