Database : MEDLINE
Search on : iodides [Words]
References found : 7893 [refine]
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[PMID]: 29522342
[Au] Autor:Tang S; Yang SW; Sun H; Zhou Y; Li J; Zhu Q
[Ad] Address:State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences , University of Chinese Academy of Sciences , 190 Kaiyuan Avenue , Guangzhou 510530 , China.
[Ti] Title:Pd-Catalyzed Divergent C(sp )-H Activation/Cycloimidoylation of 2-Isocyano-2,3-diarylpropanoates.
[So] Source:Org Lett;, 2018 Mar 09.
[Is] ISSN:1523-7052
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:A Pd-catalyzed site-selective C(sp )-H activation/cycloimidoylation of 2-isocyano-2,3-diarylpropanoates to construct diverse cyclic imine products has been developed. Six-membered 3,4-dihydroisoquinolines containing a C3 quaternary carbon center were generated dominantly by using bulky Ad P n-Bu as a ligand, while five-membered 1,1-disubstituted 1 H-isoindoles were formed preferentially in the presence of bidentate phosphine ligand DPPB. The selectivity for 1 H-isoindole formation was enhanced by using steric hindered aryl iodides. DFT calculations suggested that the experimentally observed ligand-controlled selectivity was a result of trans effect.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180309
[Lr] Last revision date:180309
[St] Status:Publisher
[do] DOI:10.1021/acs.orglett.8b00346

  2 / 7893 MEDLINE  
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[PMID]: 29512313
[Au] Autor:Yu H; Koocher N; Rondinelli J; Halasyamani PS
[Ad] Address:UNITED STATES.
[Ti] Title:Pb2BO3I: A New Borate Iodide with the Largest SHG Response in the KBe2BO3F2 (KBBF) Family.
[So] Source:Angew Chem Int Ed Engl;, 2018 Mar 07.
[Is] ISSN:1521-3773
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:Borate halides are an ideal materials class from which to design high-performance nonlinear optical (NLO) materials. Currently, borate fluorides, chlorides, and bromides are extensively investigated while borate iodide materials discovery remains rare due to perceived synthetic challenges. We report a new borate iodide, Pb2BO3I synthesized by a straightforward hydrothermal method. The Pb2BO3I chemical formula conceals that the compound exhibits a structure similiar to the well-known KBe2BO3F2 (KBBF), which we show supports the highest second-harmonic generation (SHG) at 1064 nm in the KBBF family, 10 x KH2PO4 (KDP), arising from the inclusion of Pb2+ and I- and the aforementioned crystal-chemistry. Our work shows that KBBF-related compounds can be synthesized in iodide chemistries to exhibit superior NLO reponses.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180307
[Lr] Last revision date:180307
[St] Status:Publisher
[do] DOI:10.1002/anie.201802079

  3 / 7893 MEDLINE  
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[PMID]: 29512307
[Au] Autor:Morozova V; Skotnitzki J; Moriya K; Karaghiosoff K; Knochel P
[Ad] Address:GERMANY.
[Ti] Title:Preparation of Optically Enriched Secondary Alkyllithium and Alkylcopper Reagents. Synthesis of (-)-Lardolure and Siphonarienal.
[So] Source:Angew Chem Int Ed Engl;, 2018 Mar 07.
[Is] ISSN:1521-3773
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:Optically enriched secondary alkyl iodides were converted into secondary alkyllithiums and secondary alkylcoppers with very high retention of configuration. Quenching with various electrophiles, including chiral epoxides, provided a range of chiral molecules with high enantiomeric purity (>90% ee). This method has been applied in an iterative fashion for the total synthesis of (-)-lardolure in 13 steps and 5.4% overall yield (>99% ee, dr>99:1) and siphonarienal in 15 steps and 5.6% overall yield (>99% ee, dr>99:1) starting from commercially available ethyl (R)-3-hydroxybutyrate (>99% ee).
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180307
[Lr] Last revision date:180307
[St] Status:Publisher
[do] DOI:10.1002/anie.201800792

  4 / 7893 MEDLINE  
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[PMID]: 29512252
[Au] Autor:Moon PJ; Fahandej-Sadi A; Qian W; Lundgren RJ
[Ad] Address:CANADA.
[Ti] Title:Decarboxylative Benzylation of sp2-Organoboron Reagents.
[So] Source:Angew Chem Int Ed Engl;, 2018 Mar 07.
[Is] ISSN:1521-3773
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:The Cu-catalyzed decarboxylative benzylation of aryl and alkenyl boronic esters with electron-deficient aryl acetates is reported. The oxidative coupling proceeds under mild, aerobic conditions and tolerates a host of potentially reactive electrophilic functional groups that would be problematic with traditional benzylation protocols (aryl iodides and bromides, protic heteroatoms, aldehydes, Michael acceptors). A reaction pathway in which a benzylic nucleophile is generated via aryl acetate decarboxylation and in turn is intercepted by the catalyst to form diarylmethane products is supported by mechanistic studies.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180307
[Lr] Last revision date:180307
[St] Status:Publisher
[do] DOI:10.1002/anie.201800829

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[PMID]: 29505625
[Au] Autor:Bijoy TK; Murugan P; Kumar V
[Ad] Address:Dr Vijay Kumar Foundation, 1969 Sector 4, Gurgaon 122001, Haryana, India. kumar@vkf.in vijay.kumar@snu.edu.in and Academy of Scientific and Innovative Research (AcSIR)-CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamil Nadu, India.
[Ti] Title:Atomic structure and electronic properties of A B XY (A = Si-Pb, B = Cl-I, and XY = PN and SiS) inorganic double helices: first principles calculations.
[So] Source:Phys Chem Chem Phys;, 2018 Mar 05.
[Is] ISSN:1463-9084
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:We study the structural stability and electronic properties of new classes of DNA-like inorganic double helices of the type A B XY (A = Si-Pb, B = Cl-I, and XY = PN and SiS) by employing first principles density functional theory (DFT) calculations including van der Waals interactions. In these quaternary double helices PN or SiS forms the inner helix while the AB helix wraps around the inner helix and the two are interconnected. We find that the bromides and iodides of Ge, Sn, and Pb as well as Pb Cl PN form structurally stable double helices while Ge I SiS as well as bromides and iodides of Sn and Pb have stable double helices. The atomic structures of different double helices have been analyzed in detail to understand the stability of these systems as there is up to about 80% difference in the interatomic distances in the two helices which is remarkable. Also in these new classes of double helices there is polar covalent bonding in the inner helix due to heteroatoms. We have calculated the DDEC6 partial atomic charges and bond orders which suggest strong covalent bonding in the inner helix. The electronic structure reveals that these double helices are semiconducting and in many cases the band gap is direct. Furthermore, we have studied the effects of doping and found that hole doping is the most appropriate way to tuning their electronic properties.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180305
[Lr] Last revision date:180305
[St] Status:Publisher
[do] DOI:10.1039/c7cp08231b

  6 / 7893 MEDLINE  
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[PMID]: 29450924
[Au] Autor:Kiriyama K; Okura K; Tamakuni F; Shirakawa E
[Ad] Address:Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan.
[Ti] Title:Electron-Catalyzed Coupling of Magnesium Amides with Aryl Iodides.
[So] Source:Chemistry;, 2018 Feb 15.
[Is] ISSN:1521-3765
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:An electron was found to catalyze the coupling of magnesium diarylamides with aryl iodides giving triarylamines through a radical-anion intermediate. The transformation requires no transition metal catalysts or additives, and a wide array of products are formed in good-to-excellent yields.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1802
[Cu] Class update date: 180306
[Lr] Last revision date:180306
[St] Status:Publisher
[do] DOI:10.1002/chem.201800011

  7 / 7893 MEDLINE  
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[PMID]: 29504659
[Au] Autor:Zhao S; Mankad N
[Ad] Address:UNITED STATES.
[Ti] Title:Cu-catalyzed Hydroxymethylation of Unactivated Alkyl Iodides with CO to Provide One Carbon Extended Alcohols.
[So] Source:Angew Chem Int Ed Engl;, 2018 Mar 05.
[Is] ISSN:1521-3773
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:We have developed a reductive carbonylation method by which unactivated alkyl iodides can be hydroxymethylated to provide one carbon extended alcohol products under Cu-catalyzed conditions. The method is tolerant of alkyl beta-hydrogens, is robust towards a wide variety of functional groups, and has been applied to primary, secondary, and tertiary alkyl iodide substrates. Mechanistic experiments indicate that the transformation proceeds by atom transfer carbonylation (ATC) of the alkyl iodide followed in tandem by two CuH-mediated reductions in rapid succession. This radical mechanism renders the Cu-catalyzed system complementary to precious metal-catalyzed reductive carbonylation reactions.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1803
[Cu] Class update date: 180305
[Lr] Last revision date:180305
[St] Status:Publisher
[do] DOI:10.1002/anie.201801814

  8 / 7893 MEDLINE  
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[PMID]: 29461047
[Au] Autor:Hummel T; Mos-Hummel A; Merkulova A; Ströbele M; Krishnamurthy A; Kroeker S; Meyer HJ
[Ad] Address:Section for Solid State and Theoretical Inorganic Chemistry, Institute of Inorganic Chemistry , University of Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany.
[Ti] Title:Lithium and Sodium Ion Distributions in A [W I ] Structures.
[So] Source:Inorg Chem;57(5):2570-2576, 2018 Mar 05.
[Is] ISSN:1520-510X
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Ag [W I ] and A [W I ] compounds with A = Na, Li were prepared from binary tungsten iodides (W I ) and corresponding metal iodides. Their crystal structures are analyzed on the basis of X-ray diffraction data. Li and Na solid-state NMR measurements reveal that Li and Na ions are distributed over two sites in the respective structures. These results shed some new light on A [M I ] with A = alkali and M = Mo, W compounds being reported with x = 1 and 2, which exhibit photophysical properties. The lithium compound is an exception in the series of A [W I ] compounds, because it is the only compound which is soluble in water.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1802
[Cu] Class update date: 180305
[Lr] Last revision date:180305
[St] Status:In-Process
[do] DOI:10.1021/acs.inorgchem.7b02948

  9 / 7893 MEDLINE  
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[PMID]: 29424015
[Au] Autor:Chen M; Liu F; Dong G
[Ad] Address:Department of Chemistry, University of Chicago, Chicago, IL 60637, USA.
[Ti] Title:Direct Palladium-Catalyzed ß-Arylation of Lactams.
[So] Source:Angew Chem Int Ed Engl;, 2018 Feb 08.
[Is] ISSN:1521-3773
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:A direct and catalytic method is reported here for ß-arylation of N-protected lactams with simple aryl iodides. The transformation is enabled by merging soft enolization of lactams, palladium-catalyzed desaturation, Ar-X bond activation, and aryl conjugate addition. The reaction is operated under mild reaction conditions, is scalable, and is chemoselective. Application of this method to concise syntheses of pharmaceutically relevant compounds is demonstrated.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1802
[Cu] Class update date: 180305
[Lr] Last revision date:180305
[St] Status:Publisher
[do] DOI:10.1002/anie.201800958

  10 / 7893 MEDLINE  
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[PMID]: 29377507
[Au] Autor:Takahashi K; Ogiwara Y; Sakai N
[Ad] Address:Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science (RIKADAI), Noda, Chiba, 278-8510, Japan.
[Ti] Title:Palladium-Catalyzed Reductive Coupling Reaction of Terminal Alkynes with Aryl Iodides Utilizing Hafnocene Difluoride as a Hafnium Hydride Precursor Leading to trans-Alkenes.
[So] Source:Chem Asian J;, 2018 Jan 26.
[Is] ISSN:1861-471X
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:Herein, we describe a reductive cross-coupling of alkynes and aryl iodides by using a novel catalytic system composed of a catalytic amount of palladium dichloride and a promoter precursor, hafnocene difluoride (Cp HfF , Cp=cyclopentadienyl anion), in the presence of a mild reducing reagent, a hydrosilane, leading to a one-pot preparation of trans-alkenes. In this process, a series of coupling reactions efficiently proceeds through the following three steps: (i) an initial formation of hafnocene hydride from hafnocene difluoride and the hydrosilane, (ii) a subsequent hydrohafnation toward alkynes, and (iii) a final transmetalation of the alkenyl hafnium species to a palladium complex. This reductive coupling could be chemoselectively applied to the preparation of trans-alkenes with various functional groups, such as an alkyl group, a halogen, an ester, a nitro group, a heterocycle, a boronic ester, and an internal alkyne.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1801
[Cu] Class update date: 180305
[Lr] Last revision date:180305
[St] Status:Publisher
[do] DOI:10.1002/asia.201701775


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