Category: 707-61-9

Reference of 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about Synthesis and application of aqueous polycarbodiimide crosslinking agent(I): aqueous cationic polycarbodiimide crosslinking agent. Author is Tong, Rong; Pang, Xiaoyan; Sun, Jing; Ding, Zhiwen; Jia, Jizhang.

Aqueous cationic polycarbodiimide crosslinking agent was synthesized with isophorone diisocyanate (IPDI), polypropylene glycol (PPG400), N,N-dimethylethanolamine (DMEA) and 3-methyl-1-phenyl-2-phosopholene-1-oxide (MPPO) as raw materials. The influences of synthesis conditions such as the dosage of catalyst, reaction time, reaction temperature, nitrogen jet velocity, hydrophilic end-blocking agent, end-blocking temperature and the dosage of end-blocking agent on the blocking reaction were investigated. The developed crosslinking agents were applied to protein finishing agent. And it is found that the properties of obtained finishing film agent are better in the water resistance, alkali resistance, solvent resistance and flexibility. Also, the tensile strength of film increases with a little decrease in brightness and transparency.

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Formula: C11H13OP. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about A novel stereocontrolled preparation of phospho sugar derivatives from phospholenes. Author is Yamashita, Mitsuji; Uchimura, Miyuki; Iida, Akihito; Parkanayi, Laszlo; Clardy, Jon.

Oxidation of 2-phospholene 1-oxides I (R = Ph, R1, R2 = H or Me; R = OMe, R1 = H, R2 = Me) with OsO4-KClO3 in aqueous THF afforded vicinal diols in 35-91% yields. The structure of diol II was established by preparation of its 1,2-di-O-acetyl and 1,2-O-isopropylidene derivatives and by x-ray crystallog. anal.

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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 707-61-9, is researched, Molecular C11H13OP, about Catalytic transformation of silicon tetraisocyanate Si(NCO)4 to a polymeric silylcarbodiimide, the main research direction is silylcarbodiimide polymer synthesis silicon tetraisocyanate catalytic transformation; silicon carbide formation silylcarbodiimide polymer degradation.Quality Control of 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide.

A new way for the preparation of inorganic polymeric carbodiimide-based networks is presented which resembles the transformation of mol. isocyanates using 1-phenyl-3-methyl-2-phospholene-1-oxide as a catalyst. The resp. reaction sequence, well established in preparative organic chem., has been applied for the synthesis of carbodiimide-based SiNC(O) materials. Starting from Si(NCO)4 (silicon tetraisocyanate), a transformation to an insoluble extended inorganic array was achieved in boiling dodecane (T = 216 °C). Anal. of the polymer using X-ray diffraction, FT-IR, d. measurement, matrix-assisted laser desorption/ionization time of flight and TGA revealed that this highly moisture-sensitive amorphous network consists of oligomers of high molar mass and exhibits a high d. of around 1.5 g.cm-3, which corresponds quite well to the calculated d. of crystalline Si(NCN)2 reported in the literature. Degradation of this ‘SiNC(O) phase’ with the release of N2 and (CN)2 finally provided SiC as the only crystalline product. No indication of the formation of crystalline Si3N4 or intermediate crystalline ‘SiC2N4’, silicon carbodiimide (= Si(NCN)2), was noticed. Copyright © 2012 John Wiley & Sons, Ltd.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide( cas:707-61-9 ) is researched.Quality Control of 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide.Marsden, Stephen P.; McGonagle, Alison E.; McKeever-Abbas, Ben published the article 《Catalytic aza-Wittig Cyclizations for Heteroaromatic Synthesis》 about this compound( cas:707-61-9 ) in Organic Letters. Keywords: phenanthridine benzoxazole preparation; iminophosphorane formation aza Wittig cyclization isocyanate phospholene oxide catalyst. Let’s learn more about this compound (cas:707-61-9).

The first examples of heterocycle synthesis by iminophosphorane formation/intramol. aza-Wittig cyclizations that are catalytic in the organophosphorus component are reported. The reaction has been demonstrated in the synthesis of both azine (phenanthridine) and azole (benzoxazole) heterocycles. E.g., in presence of phospholene oxide I, reaction of isocyanate 2-OCNC6H4C6H4CO2Me-2, formed from acyl azide 2-N3COC6H4C6H4CO2Me-2 by Curtius rearrangement, gave 71% phenanthridine II. Catalyst loadings down to 1 mol % have been used with little or no loss in reaction efficiency. The intimate involvement of the phosphine oxide in the catalytic cycle has been verified by in situ IR spectroscopy.

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Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 707-61-9, is researched, SMILESS is CC1=CP(CC1)(C2=CC=CC=C2)=O, Molecular C11H13OPJournal, Article, Chemistry – A European Journal called Part I: The Development of the Catalytic Wittig Reaction, Author is O’Brien, Christopher J.; Nixon, Zachary S.; Holohan, Andrew J.; Kunkel, Stephen R.; Tellez, Jennifer L.; Doonan, Bryan J.; Coyle, Emma E.; Lavigne, Florie; Kang, Lauren J.; Przeworski, Katherine C., the main research direction is Wittig reaction phosphole phospholane phosphate oxide preparation catalyst; Wittig reaction; alkenes; homogeneous catalysis; olefination; organocatalysis.Computed Properties of C11H13OP.

The authors have developed the first catalytic (in phosphane) Wittig reaction (CWR). The utilization of an organosilane was pivotal for success as it allowed for the chemoselective reduction of a phosphane oxide. Protocol optimization evaluated the phosphane oxide pre-catalyst structure, loading, organosilane, temperature, solvent, and base. These studies demonstrated that to maintain viable catalytic performance it was necessary to employ cyclic phosphane oxide pre-catalysts of type 1. Initial substrate studies utilized sodium carbonate as a base, and further experimentation identified N,N-diisopropylethylamine (DIPEA) as a soluble alternative. The use of DIPEA improved the ease of use, broadened the substrate scope and decreased the pre-catalyst loading. The optimized protocols were compatible with alkyl, aryl, and heterocyclic (furyl, indolyl, pyridyl, pyrrolyl, and thienyl) aldehydes to produce both disubstituted and trisubstituted olefins in moderate-to-high yields (60-96%) by using a pre-catalyst loading of 4-10 mol%. Kinetic E/Z selectivity was generally 66:34. Complete (E)-selectivity for disubstituted α,β-unsaturated products was achieved through a phosphane-mediated isomerization event. The CWR was applied to the synthesis of a known precursor to the anti-Alzheimer drug donepezil hydrochloride, on a multi-gram scale (12.2 g, 74% yield). In addition, the described CWR is the only transition-metal-free/heavy-metal-free catalytic olefination process, excluding proton-catalyzed elimination reactions. The synthesis of the target compounds was achieved (1R,3S)-rel-3-methyl-1-phenylphospholane 1-oxide, (1R,3R)-rel-3-methyl-1-phenylphospholane 1-oxide, 1-phenylphospholane 1-oxide as catalyst precursors. 2-Phenyl-1,3,2-dioxaphospholane 2-oxide, diethylphenylphosphine oxide, 5-phenyl-5H-benzo[b]phosphindole 5-oxide, (2R,2’R,5R,5’R)-1,1′-(1,2-ethanediyl)bis[2,5-bis(1-methylethyl)phospholane], 2-[2-[(2R,5R)-2,5-dimethyl-1-phospholanyl]phenyl]-1,3-dioxolane were also evaluated.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about Organophosphorus-catalyzed diaza-Wittig reaction: application to the synthesis of pyridazines.Quality Control of 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide.

The elaboration of the first organophosphorus-catalyzed diaza-Wittig reaction is reported. This catalytic reaction is applied to the synthesis of substituted pyridazine I (R1 = H, Me; R2 = Et, Ph, Cy, p-OMe-C6H4, o-F-C6H4, iPr, thiophenyl) and phthalazine derivatives bearing electron-withdrawing groups (R3 = CO2Me, COPh, SO2Ph) with good to excellent yields from substrates containing a diazo functionality II as the starting material and a phospholene oxide as the catalyst.

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Tong, Rong; Pang, Xiaoyan; Sun, Jing; Ding, Zhiwen; Jia, Jizhang researched the compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide( cas:707-61-9 ).SDS of cas: 707-61-9.They published the article 《Synthesis and application of aqueous cationic polycarbodiimide crosslinking agent》 about this compound( cas:707-61-9 ) in Zhongguo Pige. Keywords: aqueous IPDI PPG dimethylethanolamine cationic polycarbodiimide crosslinking agent preparation. We’ll tell you more about this compound (cas:707-61-9).

Aqueous cationic polycarbodiimide crosslinking agent was synthesized with isophorone diisocyanate(IPDI), polypropylene glycol(PPG400), N,N-di-Me ethanolamine(DMEA) and 3-methyl-1-phenyl-2-phospholene-1-oxide(MPPO) as raw materials. The influences of synthesis conditions such as the dosage of catalysis agent, reaction time, reaction temperature, nitrogen jet velocity, hydrophilic end-blocking agent, blocking temperature, and the dosage of end-blocking agent on the properties of product were investigated. The developed crosslinking agents were introduced to protein finishing agent. And it is found that the properties of obtained finishing film agent are better in the water resistance, alk. resistance, solvent resistance and flexibility. Also, the tensile strength of film increases with a little decrease in brightness and transparency.

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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 707-61-9, is researched, Molecular C11H13OP, about Preparation and properties of carbodiimide oligomers, the main research direction is carbodiimide oligomer preparation property; phospholene oxide polymerization catalyst; polycarbodiimide oligomer.HPLC of Formula: 707-61-9.

Polycarbodiimides of limited mol. weight were prepared by reacting a difunctional isocyanate, e.g. 4,4′-diisocyanatodiphenylmethane, with a monofunctional isocyanate, e.g. phenyl isocyanate, as terminating agent in the presence of 1-phenyl-3-methyl-2-phospholene-1-oxide [707-61-9] catalyst to give a carbodiimide oligomer [33970-08-0] and CO2. The polymer chains were terminated with end-groups which were equal in thermal stability to the backbone of the polymer. The polymers prepared in the oligomer range having a ratio of equivalents of difunctional to monofunctional isocyanate (r) of 6/1 to 20/1 had mech. properties very nearly equal to those of high mol. weight unterminated polymers. The terminated polymers had a lower melt viscosity than the unterminated polymers and hence a greater ease of processing.

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1,3-Benzodioxole – Wikipedia,
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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about Synthesis of 9H-Pyrrolo[1,2-a]indole and 3H-Pyrrolizine Derivatives via a Phosphine-Catalyzed Umpolung Addition/Intramolecular Wittig Reaction, the main research direction is pyrrolo indole preparation; pyrrolizine preparation; phosphine catalyzed umpolung addition Wittig indole carbaldehyde acetylene dicarboylate.Application In Synthesis of 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide.

The first umpolung addition/intramol. Wittig reaction, catalytic in phosphine, is described. The in situ phosphine oxide reduction was accomplished by the use of silane and a catalytic amount of bis(4-nitrophenyl)phosphate. This catalytic protocol is applicable to the synthesis of a wide range of functionalized 9H-pyrrolo[1,2-a]indoles and pyrrolizines (18 examples, 70-98% yields).

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1,3-Benzodioxole – Wikipedia,
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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 4-Methyl-1-phenyl-2,3-dihydro-1H-phosphole 1-oxide, is researched, Molecular C11H13OP, CAS is 707-61-9, about Convenient method for the reduction of the double-bond of cyclic vinylphosphine oxides using borane, the main research direction is cyclic vinylphosphine oxide double bond reduction borane; crystal structure hexahydrophosphinine oxide preparation; mol structure hexahydrophosphinine oxide.Related Products of 707-61-9.

The electron poor double-bond of cyclic vinylphosphine oxides is easily reduced by borane in a selective manner to give the corresponding saturated derivatives E.g., 3-methyl-1-phenyl-2,3,4,5-tetrahydro-1H-phosphole 1-oxide was formed in 71% yield upon reduction of the double bond of 1-Ph dihydrophosphole with 2.2 equiv of Me2S-BH3. Under forcing conditions, change of the functionality may also take place.

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