768-60-5

Usage

Uses

1. Used in Pharmaceutical Industry:
4-Ethynylanisole is used as an intermediate for the synthesis of histamine H3-receptor antagonists, which are essential in the development of medications targeting various conditions, including allergies and cardiovascular diseases.
2. Used in Liquid Crystal Industry:
4-Ethynylanisole serves as an intermediate in the production of liquid crystals, which are crucial components in the manufacturing of display technologies, such as LCD screens.
3. Used in Chemical Synthesis:
4-Ethynylanisole is used as a reactant in the 1,3-dipolar cycloaddition of acceptor-cyclopropylmethylsilanes, a chemical reaction that affords functionalized cyclopentenes in good yields. This process is significant in the synthesis of various organic compounds.
4. Used in Luminescent Material Production:
4-Ethynylanisole is utilized to prepare its luminescent copper complex, which has potential applications in the development of advanced materials with unique optical properties.
5. Used in Photo Luminescent Material Synthesis:
4-Ethynylanisole is employed in the synthesis of photo luminescent 1,2-dihydrophosphinines through a [4 + 2] cycloaddition reaction, contributing to the development of materials with enhanced light-emitting properties.
6. Used in Gold (III)-Catalyzed Hydroamination:
In a study involving a gold (III)-catalyzed hydroamination of alkynes, 4-Ethynylanisole is used to produce N-vinylindoles, which are valuable intermediates in the synthesis of various organic compounds and pharmaceuticals.
7. Used in Copper-Catalyzed Synthesis:
4-Ethynylanisole is involved in a three-component synthesis of trisubstituted 1,2,4-triazoles, along with an arylboronic acid and sodium azide, in a copper-catalyzed reaction. This process is significant in the development of novel chemical compounds with potential applications in various industries.

Synthesis Reference(s)

Organic Syntheses, Coll. Vol. 9, p. 230, 1998Synthesis, p. 305, 1978Tetrahedron, 62, p. 6673, 2006 DOI: 10.1016/j.tet.2005.12.077

Upstream product

• 2227-57-8 3-(4-methoxyphenyl)propynoic acid 
• 27570-08-7 4-(2-bromo-vinyl)-anisole 
• 124-41-4 sodium methylate 
• 40811-01-6 1-(1-chloroethenyl)-4-methoxybenzene 
• 87992-04-9 4-(1,2-dichloro-vinyl)-anisole 
• 67-56-1 methanol 
• 60512-57-4 1-(2,2-dibromovinyl)-4-methoxybenzene 
• 37614-59-8 4-(4-methoxyphenyl)prop-2-yn-1-ol 
• 745-36-8 4-benzhydryl-1,1'-biphenyl 
• 16543-28-5 C₉H₇KO 
• 3989-14-8 (4-methoxyphenylethynyl)trimethylsilane 
• 40886-58-6 (α-ethoxycarbonyl-α-4-methoxybenzoylmethylene)triphenylphosphorane 
• 64473-23-0 1,3,3-trimethyl-2-p-methoxyphenacylidenindoline 
• 123-11-5 4-methoxy-benzaldehyde 

Downstream Products

• 51945-21-2 N,N-diethyl-3-(4-methoxyphenyl)prop-2-yn-1-amine 
• 3672-51-3 5-(4-methoxyphenyl)-3-phenylisoxazole 
• 24208-36-4 (4-methoxy-phenyl)-glyoxal-2-(4-nitro-phenylhydrazone) 
• 33675-41-1 1-bromo-2-(4-methoxyphenyl)acetylene 
• 51758-56-6 (4-methoxy-phenyl)-glyoxal-(2,4-dinitro-phenylhydrazone) 
• 35476-69-8 1,1-diphenyl-3-p-methoxyphenylpropargyl alcohol 
• 98590-66-0 4-(1,1,2,2-tetrabromo-ethyl)-anisole 
• 412013-60-6 1-(4-methoxy-phenyl)-3-methyl-pent-1-yn-3-ol 
• 408525-49-5 1-(4-methoxy-phenyl)-4,4-dimethyl-pent-1-yn-3-ol 
• 110939-39-4 2,2,6-trimethyl-1-(4-methoxyphenylethynyl)cyclohexanol 
• 48121-13-7 copper(I) 4-methoxyphenylacetylenide 
• 82490-23-1 bis(p-methoxyphenylethynyl)mercury 
• 52999-15-2 4-(p-methoxyphenyl)-3-butyn-1-ol 
• 131732-53-1 Jodmethylat des 3-Dimethylamino-1-(4-methoxy-phenyl)-propins-⁽¹⁾ 

Relevant academic research and scientific papers

Preparation and properties of high birefringence phenylacetylene isothiocyanato-based blend liquid crystals

A series of compounds of with high birefringence containing alkoxy–phenylacetylene–isothiocyanato structure were synthesized and characterized. The chemical structures of these compounds were confirmed by FT-IR and 1H-NMR, and transition temperatures and birefringence were measured. One of these compounds with good liquid crystal property and high birefringence was mixed with host liquid crystal to form blend liquid crystal. The effects of the concentration of the compound on phase temperature range, birefringence, resistivity, dielectric anisotropy and photoelectric properties were discussed. The results showed that blend liquid crystal (with 7 wt% compound) exhibited excellent comprehensive performance.

Electrochemical Fluorination of Vinyl Boronates through Donor-Stabilized Vinyl Carbocation Intermediates**

The electrochemical generation of vinyl carbocations from alkenyl boronic esters and boronates is reported. Using easy-to-handle nucleophilic fluoride reagents, these intermediates are trapped to form fully substituted vinyl fluorides. Mechanistic studies support the formation of dicoordinated carbocations through sequential single-electron oxidation events. Notably, this electrochemical fluorination features fast reaction times and Lewis acid-free conditions. This transformation provides a complementary method to access vinyl fluorides with simple fluoride salts such as TBAF.

Synthesis and Photochemical Application of Hydrofluoroolefin (HFO) Based Fluoroalkyl Building Block

A novel fluoroalkyl iodide was synthesized on multigram scale from refrigerant gas HFO-1234yf as cheap industrial starting material in a simple, solvent-free, and easily scalable process. We demonstrated its applicability in a metal-free photocatalytic ATRA reaction to synthesize valuable fluoroalkylated vinyl iodides and proved the straightforward transformability of the products in cross-coupling chemistry to obtain conjugated systems.

Acetylenic Replacement of Albicidin's Methacrylamide Residue Circumvents Detrimental E/Z Photoisomerization and Preserves Antibacterial Activity

The natural product albicidin is a highly potent inhibitor of bacterial DNA gyrase. Its outstanding activity, particularly against Gram-negative pathogens, qualifies it as a promising lead structure in the search for new antibacterial drugs. However, as we show here, the N-terminal cinnamoyl moiety of albicidin is susceptible to photochemical E/Z isomerization. Moreover, the newly formed Z isomer exhibits significantly reduced antibacterial activity, which hampers the development and biological evaluation of albicidin and potent derivatives thereof. Hence, we synthesized 13 different variants of albicidin in which the vulnerable para-coumaric acid moiety was replaced; this yielded photostable analogues. Biological activity assays revealed that diaryl alkyne analogues exhibited virtually undiminished antibacterial efficacy. This promising scaffold will therefore serve as a blueprint for the design of a potent albicidin-based drug.

Cu-mediated or metal-free alkylation of gem-dibromoalkenes with tertiary, secondary and primary alkyl Grignard reagents

A novel copper-mediated or transition-metal-free alkylation of gem-dibromoalkenes with tertiary, secondary and primary alkyl Grignard reagents was described. The outcomes of these reactions were found to be highly dependent on the reaction conditions and

Synthesis of alkynes under dry reaction conditions

An easy synthetic method was developed under dry reaction conditions for the preparation of terminal alkynes from 1,1-dibromoalkenes and in the presence of succinimide which acts as a nucleophile and proton donor. It was demonstrated with the synthesis of a broad spectrum of terminal alkynes and extended to synthesize internal alkynes under tandem reaction conditions.

Fe-Catalyzed Selective Cyclopropanation of Enynes under Photochemical or Thermal Conditions

The nucleophilic Fe-complex Bu4N[Fe(CO)3(NO)] (TBA[Fe]) catalyzes the cyclopropanation of enynes to substituted propargyl cyclopropanes using diazoesters as carbene surrogates. The catalyst can be activated either thermally in the presence of catalytic amounts of 4-nitroanisole or under photochemical conditions. Cyclopropanation occurs selectively at the enyne moiety; alternative olefinic moieties remain intact.

Design, synthesis, antileishmanial, and antifungal biological evaluation of novel 3,5-disubstituted isoxazole compounds based on 5-nitrofuran scaffolds

Nineteen 3,5-disubstituted-isoxazole analogs were synthesized based on nitrofuran scaffolds, by a [3 + 2] cycloaddition reaction between terminal acetylenes and 5-nitrofuran chloro-oxime. The compounds were obtained in moderate to very good yields (45–91%). The antileishmanial activity was assayed against the promastigote and amastigote forms of Leishmania (Leishmania) amazonensis. Alkylchlorinated compounds 14p–r were active on both the promastigote and amastigote forms, with emphasis on compound 14p, which showed strong activity against the amastigote form (IC50 = 0.6 μM and selectivity index [SI] = 5.2). In the alkyl series, compound 14o stands out with an IC50 = 8.5 μM and SI = 8.0 on the amastigote form. In the aromatic series, the most active compounds were those containing electron-donor groups, such as trimethoxy isoxazole 14g (IC50 = 1.2 μM and SI = 20.2); compound 14h, with IC50 = 7.0 μM and SI = 6.1; and compound 14j containing the 4-SCH3 group, with IC50 = 5.7 μM and SI = 10.2. In addition, the antifungal activity of 19 nitrofuran isoxazoles was evaluated against five strains of Candida (C. albicans, C. parapsilosis, C. krusei, C. tropicalis, and C. glabrata). Eleven isoxazole derivatives were active against C. parapsilosis, and compound 14o was found to be the most active (minimal inhibitory concentration [MIC] = 3.4 μM) for this strain. Compound 14p was active against all the strains tested, with an MIC = 17.5 μM for C. glabrata, lower than that of the fluconazole used as the reference drug.

Synthesis of Phenanthrenes via Palladium-Catalyzed Three-Component Domino Reaction of Aryl Iodides, Internal Alkynes, and o-Bromobenzoic Acids

A new palladium-catalyzed domino alkyne insertion/C-H activation/decarboxylation sequence has been developed, which provides an efficient approach for synthesizing a variety of functionalized phenanthrenes in moderate to good yields. The method shows broad substrate scope and good functional group tolerance by employing readily available materials, including aryl iodides, internal alkynes, and o-bromobenzoic acids, as three-component coupling partners.

Preparation of dendritic carboranyl glycoconjugates as potential anticancer therapeutics

A series of carborane-appended glycoconjugates containing three and six glucose and galactose moieties have been synthesizedviaCu(i)-catalyzed azide-alkyne [3 + 2] click cycloaddition reaction. The carboranyl glycoconjugates containing three glucose and g