Author: Jessica.F

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (11bR)-2,6-Bis(3,5-dimethylphenyl)-4-hydroxydinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide, is researched, Molecular C36H29O4P, CAS is 861909-53-7, about Direct Interconversion of BINOL and H8-BINOL-Based Chiral Bronsted Acids Using Single-Step Red/Ox Manipulations, the main research direction is chiral binol phosphoric acid hydrogen hydrogenation; octahydrogenated binol phosphoric acid preparation; DDQ octahydrogenated binol chiral phosphoric acid oxidation; binol phosphoric acid preparation.SDS of cas: 861909-53-7.

A direct single-step hydrogenation of BINOL-based chiral phosphoric acids, N-triflyl phosphoramides, and disulfonimides to the corresponding H8-BINOL Bronsted acids in excellent yields and chemoselectivities is described. In addition, the conditions for the single-step oxidation of H8-BINOL-based Bronsted acids into the corresponding BINOL-based acids have been identified and employed to accomplish these interconversions in 41-81% yield.

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Application of 178396-31-1. 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. Compound: 6-Bromo-8-methylquinoline, is researched, Molecular C10H8BrN, CAS is 178396-31-1, about Cobalt(III)/Rhodium(III)-Catalyzed Regio- and Stereoselective Allylation of 8-methylquinoline via sp3 C-H Activation.

Regio- and stereoselective benzylic allylation of 8-methylquinolines with (per)fluoroalkyl olefins was realized via benzylic C-H activation and subsequent C-F cleavage. Both cobalt(III) and rhodium(III) catalysts can effect this transformation in good to high efficiency. The Rh(III)-catalyzed system proceeded under moderate conditions with decent substrates scope, providing (Z)-alkenyl fluorides with good to excellent regio- and stereoselectivity.

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Related Products of 41575-94-4. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: cis-Diammine(1,1-cyclobutanedicarboxylato)platinum(II), is researched, Molecular C6H12N2O4Pt, CAS is 41575-94-4, about Pathological complete response following cisplatin or carboplatin-based neoadjuvant chemotherapy for triple-negative breast cancer: a systematic review and meta-analysis. Author is Vidra, Radu; Nemes, Adina; Vidrean, Andreea; Pintea, Sebastian; Tintari, Snejeana; Deac, Andrada; Ciuleanu, Tudor.

Meta-anal. of the addition of platinum compounds to standard neoadjuvant chemotherapy (NACT) for triple-neg. breast cancer (TNBC) is highly controversial. Platinum agents, such as cisplatin and carboplatin, are DNA-damaging agents which exhibit activity in breast cancer, particularly in the TNBC subgroup. In order to assess the efficacy of each most representative platinum agent (cisplatin and carboplatin) in patients with TNBC treated with NACT, the present study performed a systematic review and meta-anal. of all available published studies on TNBC. A search of PubMed was performed to identify studies that investigated platinum-based NACT in patients with TNBC. The primary endpoints were the pooled rate of the pathol. complete response (pCR) between cisplatin vs. carboplatin-based NACT. A total of 24 studies were selected (17 studies for carboplatin and 6 studies for cisplatin and 1 study with both carboplatin and cisplatin, with 20 prospective studies) for the anal. of 1,711 patients with TNBC. Overall, the pooled rate of pCR in patients treated with platinum-based NACT was 48%. No significant differences were observed between the rates of pCR obtained under carboplatin vs cisplatin treatment. The carboplatin pCR rate was 0.470 [95% confidence interval (CI), 0.401-0.539], while the cisplatin pCR rate was 0.473 (95% CI, 0.379-0.568). The comparison between these two categories revealed no significant differences (P=0.959). In the whole, the present study demonstrates that neoadjuvant platinum-based chemotherapy improves the pCR rate in patients with TNBC, regardless of the platinum agent used. Carboplatin may thus represent a viable option due to its more favorable toxicity profile.

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Safety of (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, is researched, Molecular C36H30NO2P, CAS is 415918-91-1, about Palladium-Catalyzed Enantioselective Heteroarenyne Cycloisomerization Reaction. Author is Liang, Ren-Xiao; Song, Ling-Jie; Lu, Jin-Bo; Xu, Wei-Yan; Ding, Chao; Jia, Yi-Xia.

The extensively developed ene-type enantioselective cycloisomerization of classical 1,n-enynes provides an efficient approach to chiral cyclic 1,4-dienes. In contrast, the catalytic asym. heteroarenyne (heteroarene-alkyne) cycloisomerization involving the dearomative transformation of endocyclic aromatic C=C bonds remains unknown. Herein, we communicate a PdH-catalyzed enantioselective heteroarenyne cycloisomerization reaction of alkyne-tethered indole substrates (formal 1,5- and 1,6-enynes). Based on this strategy, a variety of structurally diverse chiral spiro and fused indoline derivatives bearing quaternary stereocenters and exocyclic C=C bonds are afforded in moderate to excellent yields and excellent enantioselectivities (up to 98% ee). The classical ene-type enantioselective 1,5-enyne cycloisomerization of N-vinylpropiolamides is also developed to afford chiral 2-pyrrolones in good to excellent ee values.

Here is just a brief introduction to this compound(415918-91-1)Safety of (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, more information about the compound((11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine) is in the article, you can click the link below.

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Cotton, F. Albert; Harris, Charles Bonner; Wise, John J. published an article about the compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II)( cas:14481-08-4,SMILESS:CC(C)(C1=O[Ni+2]2(O=C(C(C)(C)C)[CH-]1)O=C([CH-]C(C(C)(C)C)=O2)C(C)(C)C)C ).Product Details of 14481-08-4. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:14481-08-4) through the article.

Extended Hueckel-type M.O. calculations were carried out on bis(β-ketoenolate) complexes of Cu(II) and Ni(II), taking these as planar mols. of D2h symmetry, with the ring substituents as H atoms (to limit the size of the basis set of at. orbitals). The Wolfsberg-Helmholz approximation was used to estimate off-diagonal matrix elements. The diagonal matrix elements for the metal orbitals were estimated by the Ros procedure in which valence state ionization potentials are corrected (substantially) for the influence of the ligand atoms. The coefficient of the dxy orbital in 1 of the M.O.’s was constrained to have a value similar to that indicated by E.S.R. data by adjustment of the Hii terms of the O atoms. The results of the calculation are in good agreement with E.S.R. data and the visible spectra and are useful in interpreting uv spectra. 28 references.

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Electric Literature of C6H12N2O4Pt. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: cis-Diammine(1,1-cyclobutanedicarboxylato)platinum(II), is researched, Molecular C6H12N2O4Pt, CAS is 41575-94-4, about Differences in the Therapeutic Effect of Chemotherapy Regimens for Concurrent Chemoradiotherapy of Locally Advanced Non-small Cell Lung Cancer.. Author is Horiuchi, Minoru; Oguri, Tetsuya; Kagawa, Yusuke; Sone, Kazuki; Fukuda, Satoshi; Uemura, Takehiro; Takakuwa, Osamu; Maeno, Ken; Fukumitsu, Kennsuke; Kanemitsu, Yoshihiro; Tajiri, Tomoko; Ohkubo, Hirotsugu; Takemura, Masaya; Ito, Yutaka; Niimi, Akio.

BACKGROUND/AIM: The optimal chemotherapy for concurrent chemoradiotherapy (cCRT) of lung cancer is still unclear. PATIENTS AND METHODS: We investigated the therapeutic effect of different chemotherapy regimens for cCRT of lung cancer in 65 patients at our hospital. RESULTS: Of the 65 patients, 53 were male and 12 female. The median age was 64 years and 58 participants had a smoking history. The histological type was adenocarcinoma in 34 cases, squamous cell carcinoma in 22 cases, and others in 9 cases. Induction therapy consisted of cisplatin plus vinorelbine (CDDP+VNR) in 50 cases, and weekly carboplatin plus paclitaxel (CBDCA+PTX) in 15 cases. In all patients, the overall response rate, disease control rate, median progression survival, and median overall survival were 78.5%, 95.4%, 337 days, and 1,037 days, respectively. The median progression-free survival was 337 days in total; it was significantly longer for CDDP+VNR than CBDCA+PTX. The median overall survival was 1,037 days in total; it tended to be slightly longer for CDDP+VNR than CBDCA+PTX. CONCLUSION: Different chemotherapy regimens for cCRT possibly have different therapeutic effects.

Here is just a brief introduction to this compound(41575-94-4)Electric Literature of C6H12N2O4Pt, more information about the compound(cis-Diammine(1,1-cyclobutanedicarboxylato)platinum(II)) is in the article, you can click the link below.

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Formula: C36H30NO2P. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, is researched, Molecular C36H30NO2P, CAS is 415918-91-1, about Unprecedented catalytic enantioselective trapping of arene oxides with dialkylzinc reagents. Author is Bertozzi, Fabio; Crotti, Paolo; Del Moro, Federica; Feringa, Ben L.; Macchia, Franco; Pineschi, Mauro.

The first catalytic enantioselective trapping of sym. and racemic arene oxides with organometallic reagents is reported. Benzene oxide (7-oxabicyclo[4.1.0]hepta-2,4-diene) is in equilibrium with oxepin. Catalyst system included copper ditriflate and (11bR)-N,N-bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine. Thus, the reaction of 7-oxabicyclo[4.1.0]hepta-2,4-diene with dimethylzinc gave (1S,6S)-6-methyl-2,4-cyclohexadien-1-ol in 93% enantiomeric excess and 4-methyl-2,5-cyclohexadien-1-ol. Reactions of 2,3-dihydro-3a,7a-epoxy-1H-indene and 1a,7b-dihydronaphth[1,2-b]oxirene were also investigated.

Here is just a brief introduction to this compound(415918-91-1)Formula: C36H30NO2P, more information about the compound((11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine) is in the article, you can click the link below.

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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: 6-Bromo-8-methylquinoline( cas:178396-31-1 ) is researched.Application of 178396-31-1.Chen, Lijin; Zhou, Zhenfei; Zhang, Saifei; Li, Xiaoqian; Ma, Xuebing; Dong, Jiaxing published the article 《Palladium(II)-catalyzed oxidative C(sp3)-P bond formation via C(sp3)-H bond activation》 about this compound( cas:178396-31-1 ) in Chemical Communications (Cambridge, United Kingdom). Keywords: quinoline phosphonate phosphinate phosphine oxide preparation CH activation copuling; oxidative coupling secondary phosphinyl compound methylquinoline preparation phosphonate phosphinate. Let’s learn more about this compound (cas:178396-31-1).

8-Methylquinolines undergo side-chain C-H-activation and phosphinylation in palladium-catalyzed oxidative coupling with secondary phosphinyl compounds, phosphonates, phosphinates and phosphine oxides X2P(O)H, forming the corresponding 8-phosphinylmethylquinolines 8-X2P(O)CH2[C9H6-nN]Rn (X = alkoxy, aryl; R = H, halo, Me, aryl, NO2, alkenyl, alkynyl). Disclosed herein is a Pd(II)-catalyzed C(sp3)-H/P-H oxidative cross-coupling reaction between 8-methylquinolines with H-phosphonates or diarylphosphine oxides via chelation-assisted C(sp3)-H bond activation. The protocol exhibits a relatively broad functional-group tolerance and exclusive chemo- and regioselectivity. Furthermore, detailed mechanistic studies support the proposed reaction pathway.

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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Non-stabilized nucleophiles in Cu-catalysed dynamic kinetic asymmetric allylic alkylation, published in 2015-01-15, which mentions a compound: 415918-91-1, mainly applied to copper catalyzed dynamic kinetic asym transformation racemic substrate; unstabilized nucleophile dynamic kinetic asym allylic alkylation mechanism; organometallic reagent preparation dynamic kinetic asym allylic alkylation; medicinal tuberculosis leprosy preparation; aminobenzoate biosynthesis inhibitor preparation, Reference of (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine.

The development of new reactions forming asym. carbon-carbon bonds has enabled chemists to synthesize a broad range of important carbon-containing mols., including pharmaceutical agents, fragrances and polymers. Most strategies to obtain enantiomerically enriched mols. rely on either generating new stereogenic centers from prochiral substrates or resolving racemic mixtures of enantiomers. An alternative strategy-dynamic kinetic asym. transformation-involves the transformation of a racemic starting material into a single enantiomer product, with greater than 50 per cent maximum yield. The use of stabilized nucleophiles (pKa < 25, where Ka is the acid dissociation constant) in palladium-catalyzed asym. allylic alkylation reactions has proved to be extremely versatile in these processes. Conversely, the use of non-stabilized nucleophiles in such reactions is difficult and remains a key challenge. Here we report a copper-catalyzed dynamic kinetic asym. transformation using racemic substrates and alkyl nucleophiles. These nucleophiles have a pKa of ≥50, more than 25 orders of magnitude more basic than the nucleophiles that are typically used in such transformations. Organometallic reagents are generated in situ from alkenes by hydrometallation and give highly enantioenriched products under mild reaction conditions. The method is used to synthesize natural products that possess activity against tuberculosis and leprosy, and an inhibitor of para-aminobenzoate biosynthesis. Mechanistic studies indicate that the reaction proceeds through a rapidly isomerizing intermediate. We anticipate that this approach will be a valuable complement to existing asym. catalytic methods. Here is just a brief introduction to this compound(415918-91-1)Reference of (11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine, more information about the compound((11bR)-N,N-Bis[(1R)-1-phenylethyl]dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-amine) is in the article, you can click the link below.

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Quality Control of Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II). The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Film microstructure-deposition condition relationships in the growth of epitaxial NiO films by metalorganic chemical vapor deposition on oxide and metal substrates. Author is Wang, Anchuan; Belot, Ohn A.; Marks, Tobin J..

High-quality epitaxial or highly textured NiO thin films can be grown at temperatures of 400-750 °C by low-pressure metalorganic chem. vapor deposition (MOCVD) on MgO, SrTiO3, C-cut sapphire, as well as on single crystal and highly textured Ni (200) metal substrates using Ni(dpm)2 (dpm = dipivaloylmethanate) as the volatile precursor and O2 or H2O as the oxidizer/protonolyzer. X-ray diffraction (XRD), SEM/energy dispersive detection (SEM/EDX), and at. force microscopy (AFM) confirm that the O2-derived NiO films are smooth and that the quality of the epitaxy can be improved by decreasing the growth temperature and/or the precursor flow rate. However, low growth temperatures (400-500 °C) lead to rougher surfaces and carbon contamination. The H2O-derived NiO films, which can be obtained only at relatively high temperatures (650-750 °C), exhibit slightly broader w scan full width half-maximum (FWHM) values and rougher surfaces but no carbon contamination. Using H2O as the oxidizer/protonolyzer, smooth and highly textured NiO (111) films can be grown on easily oxidized single crystal and highly textured Ni (200) metal substrates, which is impossible when O2 is the oxidizer. The textural quality of these films depends on both the quality of the metal substrates and the gaseous precursor flow rate.

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