Tag: 400-500

2(E), 4(Z)-Alkadienoates using the Wittig reaction was written by Baumann, Manfred;Hoffmann, Werner. And the article was included in Synthesis in 1977.Quality Control of Isopentyltriphenylphosphonium bromide This article mentions the following:

2(E),4(Z)-RCH:CHCH:CHCO₂Et (R = Et, Pr, Me₂CHCH₂, pentyl, hexyl, heptyl) with fruit-like odors were prepared in 57-73% yields by treating (E)-OHCCH:CHCO₂Et with RCH₂P⁺Ph₃Br^– in the presence of NaNH₂. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Quality Control of Isopentyltriphenylphosphonium bromide).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Quality Control of Isopentyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Development and Mechanistic Investigations of Enantioselective Pd-Catalyzed Intermolecular Hydroaminations of Internal Dienes was written by Park, Sangjune;Malcolmson, Steven J.. And the article was included in ACS Catalysis in 2018.Name: Isopentyltriphenylphosphonium bromide This article mentions the following:

We report the development of highly enantio- and regioselective Pd-catalyzed intermol. hydroaminations of challenging 1,4-disubstituted acyclic dienes. Several aryl/alkyl-disubstituted dienes and a sterically differentiated alkyl/alkyl-disubstituted diene undergo coupling with a variety of secondary aliphatic amines, indoline, and primary anilines to generate allylic amines with myriad α-alkyl groups in up to 78% yield, >98:2 rr, and 98.5:1.5 er. A number of experiments, including deuterium labeling and transamination studies, shed light on mechanistic details of the reaction, such as the reversibility of individual steps of the proposed catalytic cycle and of the reaction as a whole. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Name: Isopentyltriphenylphosphonium bromide).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Name: Isopentyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Scandium-bipyridine-catalyzed enantioselective aminolysis of meso-epoxides was written by Mai, Enzo;Schneider, Christoph. And the article was included in Chemistry – A European Journal in 2007.Safety of Isopentyltriphenylphosphonium bromide This article mentions the following:

The scandium-bipyridine-catalyzed enantioselective addition of anilines and O-alkyl hydroxylamines to meso-epoxides has been optimized and extended to a broad range of epoxides and amines. Whereas aromatic meso-epoxides generally furnished the corresponding 1,2-amino alcs., e.g., I, in excellent enantioselectivities, aliphatic meso-epoxides only gave rise to moderate enantioselectivities in the aminolysis. The catalyst loading may be lowered to just 5 mol% with only marginal effects on yield and enantioselectivity. A strong pos. nonlinear effect has been observed, pointing to aggregation phenomena of the catalyst. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Safety of Isopentyltriphenylphosphonium bromide).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Safety of Isopentyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Silver complexes [Ph₃PCH₂CH₂PPh₃]²⁺[Ag₂Cl₄]^2-, [Ph₃PCH₂OCH₃]⁺₂[Ag₂Cl₄]^2-, [Ph₃P(i-Am)]⁺₂[Ag₂Br₄]^2-, [Ph₃PC₆H₁₁-cyclo]⁺₂[Ag₂Br₄]^2-, [Ph₃PCH₂Ph]⁺₂[Ag₂Br₄]^2-, and [Ph₃PCH:CH₂]⁺_n[Ag₂Br₃]^–_n, [Me₄P]⁺_n[Ag₂Br₃]^–_n: Synthesis and structure was written by Sharutin, V. V.;Sharutina, O. K.;Senchurin, V. S.;Neudachina, A. N.. And the article was included in Russian Journal of Inorganic Chemistry in 2016.Recommanded Product: Isopentyltriphenylphosphonium bromide This article mentions the following:

Silver complexes [Ph₃PCH₂CH₂PPh₃]²⁺[Ag₂Cl₄]^2- (1), [Ph₃PCH₂OCH₃]⁺₂[Ag₂Cl₄]^2- (2), [Ph₃P(i-Am)]⁺₂[Ag₂Br₄]^2- (3), [Ph₃PC₆H₁₁-cyclo]⁺₂[Ag₂Br₄]^2- (4), [Ph₃PCH₂Ph]⁺₂[Ag₂Br₄]^2- (5), [Ph₃PCH:CH₂]_n⁺[Ag₂Br₃]_n^n- (6), and [Me₄P]_n⁺[Ag₂Br₃]_n^n- (7) have been synthesized by the reaction between tetraorganylphosphonium halides and silver chloride or silver bromide in dimethylsulfoxide. According to x-ray diffraction data, the ionic complexes are built of tetraorganylphosphonium cations and binuclear (1–5) or polynuclear (6, 7) anions. In the anions of complexes 6 and 7, silver atoms are tetracoordinated, and bromine atoms have coordination numbers of 2 and 4. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Recommanded Product: Isopentyltriphenylphosphonium bromide).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Recommanded Product: Isopentyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis of the four stereoisomers of 22,23-dimethylcholesterol was written by Gebreyesus, Tarekegn;Djerassi, Carl. And the article was included in Journal of Organic Chemistry in 1985.SDS of cas: 28322-40-9 This article mentions the following:

The 4 diastereoisomers of 22,23-dimethylcholesterol I were prepared from cyclodinorcholanal II and characterized by NMR spectroscopy and HPLC. Thus, Grignard reaction of Me iodide with II and subsequent Jones oxidation gave cyclonorcholenone III (Z = O), which underwent Wittig condensation with Me₂CHCH₂CH₂P⁺Ph₃ Br^– to give III (Z = Me₂CHCH₂CH:). Hydroboration-oxidation of the latter and then Jones oxidation gave methylcyclocholestanones IV (Z¹ = O), which underwent Wittig reaction with MeP⁺Ph₃ Br^– to give IV (Z¹ = CH₂🙂 (V). Hydrogenation of (22R)-V and subsequent hydrolysis gave (22S,23R)- and (22S,23S)-I. Hydroboration-oxidation of (22S)-V gave diastereoisomeric IV (Z¹ = H, HOCH₂), which underwent successive mesylation, LiAlH₄ reduction, and hydrolysis to give (22R,23R)- and (22R,23S)-I. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9SDS of cas: 28322-40-9).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.SDS of cas: 28322-40-9

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Stereoselective Rhodium-Catalyzed Isomerization of Stereoisomeric Mixtures of Arylalkenes was written by Yang, Hongxuan;Dong, Wenke;Wang, Wencan;Li, Tao;Zhao, Wanxiang. And the article was included in Synthesis in 2020.Formula: C23H26BrP This article mentions the following:

A new efficient method for the synthesis of a high ratio of E-alkenes (E)-ArCH=CHR (Ar = C₆H₅, 4-pyridyl, 2-thienyl, etc.; R = i-Pr, Ph, Bn) from E/ Z mixtures of alkenes (E)/(Z)-ArCH=CHR with B₂pin₂ in the presence of a rhodium catalyst is described. This reaction features mild reaction conditions, broad functional group tolerance, and highly great application potential. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Formula: C23H26BrP).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Formula: C23H26BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Fast atom bombardment and laser desorption mass spectrometry for determination of alkyltriphenylphosphonium salts was written by McCrery, D. A.;Peake, D. A.;Gross, Michael L.. And the article was included in Analytical Chemistry in 1985.Computed Properties of C23H26BrP This article mentions the following:

Mass spectra of alkyltriphenylphosphonium halides were obtained by using fast atom bombardment (FAB) coupled with tandem mass spectrometry (MS/MS) and laser desorption (LD) with Fourier-transform mass spectrometry (FTMS). In addition, collisionally activated dissociation (CAD) spectra of laser-desorbed phosphonium ions were obtained. The 2 methods of ionization are equally useful in determining mol. weight of the phosphonium ions. However, high-energy collisional activation is needed to obtain unambiguous structural confirmation of the alkyl group. In addition, ion abundance ratios provide information about the internal energy of the phosphonium ions produced by LD and FAB. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Computed Properties of C23H26BrP).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Computed Properties of C23H26BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A convergent total synthesis of a new antiepileptic ceramide and its triacetyl derivative using olefin cross metathesis was written by Ghosal, Partha;Kumar, Vikas;Shaw, Arun K.. And the article was included in Tetrahedron in 2010.Safety of Isopentyltriphenylphosphonium bromide This article mentions the following:

A convergent total synthesis of a new antiepileptic ceramide I and its triacetyl derivative was completed by using two important C-C bond forming reactions, Wittig methylenation and olefin cross metathesis as the key steps. The easily available 3,4,6-tri-O-benzyl-D-galactal was used as a chiral pool for the synthesis of highly functionalized amide and the com. available 1,12-dodecanediol for the long chain olefin counterpart. The long hydrocarbon chain of the new ceramide was installed by using olefin cross metathesis between amide and long chain terminal olefin followed by hydrogenation. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Safety of Isopentyltriphenylphosphonium bromide).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Safety of Isopentyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Catalytic, Enantioselective, Intramolecular Carbosulfenylation of Olefins. Preparative and Stereochemical Aspects was written by Denmark, Scott E.;Jaunet, Alex. And the article was included in Journal of Organic Chemistry in 2014.Related Products of 28322-40-9 This article mentions the following:

The first catalytic, enantioselective, intramol. carbosulfenylation of isolated alkenes with aromatic nucleophiles is described. The combination of N-(phenylsulfenyl)phthalimide, a chiral selenophosphoramide derived from BINAM, and ethanesulfonic acid as a cocatalytic Bronsted acid induced an efficient and selective cyclofunctionalization of various alkenes (aliphatic and aromatic) tethered to a 3,4-(methylenedioxy)phenyl ring (e.g., I → II). Under these conditions, 6-(phenylthio)-5,6,7,8-tetrahydronaphthalenes are formed diastereospecifically in good yields (50-92%) and high enantioselectivities (71:29-97:3 er). E-Alkenes reacted much more rapidly and with much higher selectivity than Z-alkenes, whereas electron-rich alkenes reacted more rapidly but with comparable selectivity to electron-neutral alkenes and electron-deficient alkenes. The Bronsted acid played a critical role in effecting reproducible enantioselectivity. A model for the origin of enantioselectivity and the dependence of rate and selectivity on alkene structure is proposed along with a rationale for the site selectivity in reactions with mono-activated arene nucleophiles. Safety: procedures for safe handling and disposal of Tl- and As-containing compounds are provided. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Related Products of 28322-40-9).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Related Products of 28322-40-9

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis and insecticidal activity of lignan analogs. Part 6. Synthesis and insecticidal activity of sesquilignan analogs with 2-alkyl-6-methoxy-3-(3,4-methylenedioxyphenyl)-1,4-benzodioxanyl group was written by Yamauchi, Satoshi;Taniguchi, Eiji. And the article was included in Bioscience, Biotechnology, and Biochemistry in 1992.Electric Literature of C23H26BrP This article mentions the following:

The methoxymethyl group of the 6-methoxy-2-methoxymethyl-3-(3,4-methylenedioxyphenyl)-1,4-benzodioxan-7-yl moiety of insecticidal lignans of Phryma was modified with several alkyl groups to evaluate the effect on activity of the substituents. The assay results make it evident that this activity was significantly modified by the chain length or bulkiness of the alkyl groups and that the oxygen atom of the methoxymethyl group was fairly important for enhancing the activity. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Electric Literature of C23H26BrP).

Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Electric Literature of C23H26BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary