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Pyrido[1,2-a]benzimidazole, 8-fluoro- (9CI) is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

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  • 136343-75-4 Structure
  • Basic information

    1. Product Name: Pyrido[1,2-a]benzimidazole, 8-fluoro- (9CI)
    2. Synonyms: Pyrido[1,2-a]benzimidazole, 8-fluoro- (9CI)
    3. CAS NO:136343-75-4
    4. Molecular Formula: C11H7FN2
    5. Molecular Weight: 186.1850832
    6. EINECS: N/A
    7. Product Categories: BENZIMIDAZOLE
    8. Mol File: 136343-75-4.mol
  • Chemical Properties

    1. Melting Point: 182-183 °C
    2. Boiling Point: 276.1±33.0 °C(Predicted)
    3. Flash Point: N/A
    4. Appearance: /
    5. Density: 1.30±0.1 g/cm3(Predicted)
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. PKA: 5.31±0.50(Predicted)
    10. CAS DataBase Reference: Pyrido[1,2-a]benzimidazole, 8-fluoro- (9CI)(CAS DataBase Reference)
    11. NIST Chemistry Reference: Pyrido[1,2-a]benzimidazole, 8-fluoro- (9CI)(136343-75-4)
    12. EPA Substance Registry System: Pyrido[1,2-a]benzimidazole, 8-fluoro- (9CI)(136343-75-4)
  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 136343-75-4(Hazardous Substances Data)

136343-75-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 136343-75-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,3,4 and 3 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 136343-75:
(8*1)+(7*3)+(6*6)+(5*3)+(4*4)+(3*3)+(2*7)+(1*5)=124
124 % 10 = 4
So 136343-75-4 is a valid CAS Registry Number.

136343-75-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017

1.Identification

1.1 GHS Product identifier

Product name 8-Fluoropyrido[1,2-a]benzimidazole

1.2 Other means of identification

Product number -
Other names OCTANOIC ACID,8-FLUORO-,ETHYL ESTER

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:136343-75-4 SDS

136343-75-4Downstream Products

136343-75-4Relevant articles and documents

Hypervalent iodine(iii) catalyzed oxidative C-N bond formation in water: Synthesis of benzimidazole-fused heterocycles

Rao, D. Nageswar,Rasheed,Vishwakarma, Ram A.,Das, Parthasarathi

, p. 25600 - 25604 (2014)

An iodine(iii) catalyzed C(sp2)-H functionalization- intramolecular amination reaction of N-aryl-2-amino-N-heterocycles has been developed in water and under ambient conditions. This metal-free open-flask chemistry is general and successfully applied in synthesizing the benzimidazole-fused heterocycles pyrido[1,2-a]benzimidazole, benzimidazo[1,2-a]quinoline and benzimidazo[2,1-a]isoquinoline derivatives. the Partner Organisations 2014.

Palladium-Catalyzed Electro-oxidative C-H Amination toward the Synthesis of Pyrido[1,2- A[benzimidazoles with Hydrogen Evolution

Duan, Zhengli,Lei, Aiwen,Lu, Lijun,Shi, Renyi,Zeng, Li,Zhang, Lin,Zhang, Wenxin

, p. 3828 - 3831 (2020)

Transition-metal-catalyzed oxidative C-H/N-H coupling reaction is an important method to construct C-N bonds. However, stoichiometric oxidants were usually necessary. Here, we report a palladium-catalyzed electro-oxidative intramolecular C-H/N-H annulation reaction without an external oxidant or additive. A variety of pyrido[1,2-a]benzimidazoles were constructed by a simple, green, and mild path. Experimental results suggested that Pd(0) could be oxidized on the anode to be recycled.

Tunable Electrochemical C?N versus N?N Bond Formation of Nitrogen-Centered Radicals Enabled by Dehydrogenative Dearomatization: Biological Applications

Chen, Jianbin,Cui, Yuezhi,Gao, Wei,Han, Xiaoxin,Hu, Wei,Lv, Shide,Ma, Li,Niu, Liwei,Wang, Jian-Yong,Wu, Yanwei,Zhou, Jianhua,Zhou, Mingyang

, p. 11583 - 11590 (2020/05/06)

Herein, an environmentally friendly electrochemical approach is reported that takes advantage of the captodative effect and delocalization effect to generate nitrogen-centered radicals (NCRs). By changing the reaction parameters of the electrode material and feedstock solubility, dearomatization enabled a selective dehydrogenative C?N versus N?N bond formation reaction. Hence, pyrido[1,2-a]benzimidazole and tetraarylhydrazine frameworks were prepared through a sustainable transition-metal- and exogenous oxidant-free strategy with broad generality. Bioactivity assays demonstrated that pyrido[1,2-a]benzimidazoles displayed antimicrobial activity and cytotoxicity against human cancer cells. Compound 21 exhibited good photochemical properties with a large Stokes shift (approximately 130 nm) and was successfully applied to subcellular imaging. A preliminary mechanism investigation and density functional theory (DFT) calculations revealed the possible reaction pathway.

C-H cycloamination of N-aryl-2-aminopyridines and N-arylamidines catalyzed by an in situ generated hypervalent iodine(iii) reagent

He, Yimiao,Huang, Jinbo,Liang, Dongdong,Liu, Lanying,Zhu, Qiang

, p. 7352 - 7354 (2013/09/23)

A metal-free synthesis of diversified pyrido[1,2-a]benzimidazoles and 1H-benzo[d]imidazoles from N-aryl-2-aminopyridines and N-arylamidines has been developed. The C-H cycloamination reaction was catalyzed by hypervalent iodine(iii) species generated in situ from iodobenzene (catalytic) and peracetic acid (stoichiometric). The reaction proceeded smoothly at ambient temperature to provide the corresponding N-heterocycles in good to excellent yields.

A metal-free tandem demethylenation/C(sp2)-H cycloamination process of N -Benzyl-2-aminopyridines via C-C and C-N bond cleavage

Liang, Dongdong,He, Yimiao,Liu, Lanying,Zhu, Qiang

, p. 3476 - 3479 (2013/07/26)

A mild, metal-free synthesis of pyrido[1,2-a]benzimidazoles starting with N-benzyl-2-aminopyridines, which employs PhI(OPiv)2 as a stoichiometric oxidant, has been developed. The process is initiated by an unusual PhI(OPiv)2-mediated ipso SEAr reaction, followed by solvent-assisted C-C and C-N bond cleavage.

Synthesis of pyrido[1,2-a]benzimidazoles through a copper-catalyzed cascade C-N coupling process

Wu, Zhiqing,Huang, Qing,Zhou, Xiangge,Yu, Lintao,Li, Zhengkai,Wu, Di

supporting information; experimental part, p. 5242 - 5245 (2011/11/13)

A simple and efficient method for the preparation ofpyrido[1,2-a] benzimidazoles by a copper-catalyzed inter-and intramolecular C-N coupling cascade process was designed and carried out, and the products were obtained in moderate to excellent yields (up to 93 %).

On the importance of an acid additive in the synthesis of pyrido[1,2-a]benzimidazoles by direct copper-catalyzed amination

Masters, Kye-Simeon,Rauws, Tom R. M.,Yadav, Ashok K.,Herrebout, Wouter A.,Van Der Veken, Benjamin,Maes, Bert U. W.

, p. 6315 - 6320 (2011/07/31)

Not just an acid! An expedient and highly modular synthesis of 6-, 7-, and 8-substituted pyrido[1,2-a]benzimidazoles (4) has been developed by a direct intramolecular C-H amination of N-phenylpyridin-2-amines (3). Efficient C-H amination of 3 could only be achieved in the presence of catalytic copper and an acid additive. The type of acid (pKa) proved to be crucial for the catalysis. C-Cl aminations in N-(2-chloroaryl)pyridin-2-amines allow access to 9-substituted pyrido[1,2-a]benzimidazoles. Copyright

A direct intramolecular C-H amination reaction cocatalyzed by copper(II) and iron(III) as part of an efficient route for the synthesis of pyrido[1,2-a ]benzimidazoles from N-aryl-2-aminopyridines

Wang, Honggen,Wang, Yong,Peng, Changlan,Zhang, Jiancun,Zhu, Qiang

supporting information; experimental part, p. 13217 - 13219 (2010/11/04)

A novel and efficient synthesis of pyrido[1,2-a]benzimidazoles through direct intramolecular aromatic C-H amination of N-aryl-2-aminopyridines has been developed. The reaction, cocatalyzed by Cu(OAc)2 and Fe(NO 3)3?9H

Heteroatomic photocyclization of fluorinated anilinoazines

Frolov

, p. 1047 - 1051 (2007/10/03)

New tetrafluoro derivatives of pyrido[1,2-a]benzimidazole and 1,3-dimethylpyrimido[1,2-a]benzimidazole were obtained as a result of photoinduced cyclization of 2-(pentafluoroanilino)pyridine and 4,6-dimethyl-2-(pentafluoroanilino)pyrimidine at the heterocyclic nitrogen atom. The cyclization quantum yield increases with increasing fluorine substitution of the benzene ring in the initial amine. 9,10-Anthraquinone-2,6-disulfonic acid sensitizes photocyclization of 2-(2,4-difluoroanilino)pyridine. Radical cations are presumed to participate in the reaction. 1998 MAHK Hayka/Interperiodica Publishing.

PHOTOCYCLIZATION OF HETEROARENES

Baklanov, M. V.,Frolov, A. N.

, p. 550 - 559 (2007/10/02)

The new reaction of the photocyclization of heteroarenes is described.It leads to the formation of condensed imidazoles with various structures.The relation of the acid-base properties to the course of the alkylation reaction was studied.For the case of 8-chlorodipyridoimidazole it was shown that mono- and diprotonation goes at the atom N5, but methylation at the atoms N5 and N6.

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