Tag: M.W=300-350

Ito, Kazuaki published the artcileStudy on host-guest complexation of anions based on 2,2′-dihydroxyl-1,1′-binaphthalene derivatives, SDS of cas: 2960-93-2, the publication is Letters in Organic Chemistry (2006), 3(10), 735-740, database is CAplus.

The anion binding properties of 2,2′-dihydroxy-1,1′-binaphthalene (BINOL) derivatives were studied by ¹H NMR spectroscopy. BINOL derivatives formed complexes with anions through hydrogen bonding of the hydroxyl groups and showed a binding preference to dihydrogen phosphate (H₂PO₄^–) and acetate (AcO^–) in comparison with other anions (Cl^–, Br^–, I^–, NO₃^–, and HSO₄^–) tested.

Letters in Organic Chemistry published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, SDS of cas: 2960-93-2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Paddon, Christopher A. published the artcileCoulometry on the voltammetric timescale: microdisk potential-step chronoamperometry in aprotic solvents reliably measures the number of electrons transferred in an electrode process simultaneously with the diffusion coefficients of the electroactive species, Product Details of C22H18O2, the publication is Electroanalysis (2007), 19(1), 11-22, database is CAplus.

Microdisk, single potential-step chronoamperometry, is applied to a range of organic substrates in the aprotic solvents THF, propylene carbonate, MeCN and the room temperature ionic liquid [C₄dmim][N(Tf)₂] (1-butyl-2,3-dimethylimidazolium bis(trifluoromethylsulfonyl)imide). Fitting of the chronoamperometric transients was achieved using the Shoup and Szabo method. Accurate values for the diffusion coefficients, D, and the number of electron(s) transferred, n, in the electrode process were simultaneously and consistently obtained. This method is generally applicable and reliable for the determination of the number of electrons transferred in faradaic processes uncomplicated by relatively slow coupled homogeneous kinetics. Since the experiment is conducted essentially on typical voltammetric timescales it can be commended as a complementary technique for classical coulometry which is only possible on much longer timescales. The chronoamperometric method is therefore likely to be of greater relevance to the interpretation of voltammetric data.

Electroanalysis published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Product Details of C22H18O2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Kotha, Sambasivarao published the artcileModular Approach to Benzofurans, 2H-Chromenes and Benzoxepines via Claisen Rearrangement and Ring-Closing Metathesis: Access to Phenylpropanoids, Computed Properties of 159-62-6, the publication is Chemistry – An Asian Journal (2022), 17(8), e202200084, database is CAplus and MEDLINE.

Benzofurans, 2H-chromenes and benzoxepines are key structural elements present in several natural products and pharmaceuticals. Here, an easy-to-execute strategy for the synthesis of benzofurans, 2H-chromenes and benzoxepines, by employing Claisen rearrangement and ring-closing metathesis as key steps is reported. A variety of phenols were converted into useful oxacycles in good to excellent yields. The ring-closing metathesis approach has been used to produce phenylpropanoid natural products. Examples described here include, the naturally occurring benzofurans such as 7-methoxywutaifuranal, 7-methoxywutaifuranol, 7-methoxywutaifuranate and the O-prenylated natural products like boropinic acid, boropinols A and C.

Chemistry – An Asian Journal published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Computed Properties of 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Vesce, Luigi published the artcileEfficient and stable perovskite large area cells by low-cost fluorene-xantene-based hole transporting layer, Name: Spiro[fluorene-9,9′-xanthene], the publication is Energies (Basel, Switzerland) (2021), 14(19), 6081, database is CAplus.

Among the new generation photovoltaics, perovskite solar cell (PSC) technol. reached top efficiencies in a few years. Currently, the main objective to further develop PSCs is related to the fabrication of stable devices with cost-effective materials and reliable fabrication processes to achieve a possible industrialization pathway. In the n-i-p device configuration, the hole transporting material (HTM) used most is the highly doped organic spiro-fluorene-based material (Spiro-OMeTAD). In addition to the high cost related to its complex synthesis, this material has different issues such as poor photo, thermal and moisture stability. Here, we test on small and large area PSCs a com. available HTM (X55, Dyenamo) with a new core made by low-cost fluorene-xantene units. The one-pot synthesis of this compound reduces 30 times its cost with respect to Spiro-OMeTAD. The optoelectronic performances and properties are characterized through JV measurement, IPCE (incident photon to current efficiency), steady-state photoluminescence and ISOS stability test. SEM (scanning electron microscope) images reveal a uniform and pinhole free coverage of the X55 HTM surface, which reduces the charge recombination losses and improves the device performance relative to Spiro-OMeTAD from 16% to 17%. The ISOS-D-1 stability test on large area cells without any encapsulation reports an efficiency drop of about 15% after 1000 h compared to 30% for the reference case.

Energies (Basel, Switzerland) published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C13H10O2, Name: Spiro[fluorene-9,9′-xanthene].

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Morioka, Kohei published the artcileSynthesis and chiral recognition ability of optically active poly{N-[(R)-α-methoxycarbonylbenzyl]methacrylamide} with various tacticities by radical polymerization using Lewis acids, Name: 2,2′-Dimethoxy-1,1′-binaphthalene, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2003), 41(21), 3354-3360, database is CAplus.

The radical polymerization of an optically active methacrylamide, N-[(R)-α-methoxycarbonylbenzyl]methacrylamide, was carried out in the absence and presence of Lewis acids such as ytterbium trifluoromethanesulfonate [Yb(OTf)₃] and scandium trifluoromethanesulfonate [Sc(OTf)₃]. Catalytic amounts of the Lewis acids significantly affected the stereoregularity of the obtained polymers. The polymerization with Yb(OTf)₃ in THF afforded isotactic polymers (up to mm = 87%), whereas the conventional radical method without the Lewis acid produced polymers rich in syndiotacticity (up to rr = 88%). The radical polymerization in the presence of MgBr₂ proceeded in a heterotactic-selective manner (mr = 63%). Thus, the isotactic, syndiotactic, and heterotactic poly(methacrylamide)s were synthesized by the radical processes. The chiral recognition abilities of the obtained optically active poly(methacrylamide)s were affected by the stereoregularity.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Name: 2,2′-Dimethoxy-1,1′-binaphthalene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Tu, Tao published the artcileRobust Acenaphthoimidazolylidene Palladium Complexes: Highly Efficient Catalysts for Suzuki-Miyaura Couplings with Sterically Hindered Substrates, Application of 2,2′-Dimethoxy-1,1′-binaphthalene, the publication is Organic Letters (2012), 14(16), 4250-4253, database is CAplus and MEDLINE.

Robust acenaphthoimidazolylidene palladium complexes I [R = i-Pr, R’= H; R = R’ = Me, H] have been demonstrated as highly efficient and general catalysts for the sterically hindered Suzuki-Miyaura cross-coupling reactions in excellent yields even with low catalyst loadings under mild reaction conditions. The high catalytic activity of these complexes highlights that, besides the “flexible steric bulky” concept, σ-donor properties of the NHC ligands are also crucial to accelerate the transformations.

Organic Letters published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C5H12O2, Application of 2,2′-Dimethoxy-1,1′-binaphthalene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Guo, Sheng published the artcileVersatile Porous Poly(arylene ether)s via Pd-Catalyzed C-O Polycondensation, Quality Control of 159-62-6, the publication is Journal of the American Chemical Society (2021), 143(30), 11828-11835, database is CAplus and MEDLINE.

Porous organic polymers (POPs) with strong covalent linkages between various rigid aromatic structural units having different geometries and topologies are reported. With inherent porosity, predictable structure, and tunable functionality, POPs have found utility in gas separation, heterogeneous catalysis, sensing, and water treatment. Poly(arylene ether)s (PAEs) are a family of high-performance thermoplastic materials with high glass-transition temperatures, exceptional thermal stability, robust mech. properties, and excellent chem. resistance. These properties are desirable for development of durable POPs. However, the synthetic methodol. for the preparation of these polymers has been mainly limited in scope to monomers capable of undergoing nucleophilic aromatic substitution (S_NAr) reactions. Herein, we describe a new general method using Pd-catalyzed C-O polycondensation reactions for the synthesis of PAEs. A wide range of new compositions and PAE architectures are now readily available using monomers with unactivated aryl chlorides and bromides. Specifically, monomers with conformational rigidity and intrinsic internal free volume are now used to create porous organic polymers with high mol. weight, good thermal stability, and porosity. The reported porous PAEs are solution processable and can be used in environmentally relevant applications including heavy-metal-ion sensing and capture.

Journal of the American Chemical Society published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, Quality Control of 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Genaev, Alexander M. published the artcileAcid-Catalyzed Versus Thermally Induced C1-C1′ Bond Cleavage in 1,1′-Bi-2-naphthol: An Experimental and Theoretical Study, Recommanded Product: 2,2′-Dimethoxy-1,1′-binaphthalene, the publication is Journal of Organic Chemistry (2019), 84(11), 7238-7243, database is CAplus and MEDLINE.

Experiments show that 1,1′-bi-2-naphthol (BINOL) undergoes facile C1-C1′ bond cleavage under action of triflic acid at temperatures above 0 °C to give mainly 2-naphthol along with oligomeric material. CASSCF and MRMP//CASSCF computations have demonstrated unambiguously that this unusual mode of scission of the biaryl bond can occur in the C1,C1′-diprotonated form of BINOL via a mechanism involving homolytic cleavage prompted by the intramol. electrostatic repulsion. These findings also provide insights into the mechanism of a comparatively easy thermal cleavage of BINOL, implying the intermediacy of its neutral diketo form.

Journal of Organic Chemistry published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Recommanded Product: 2,2′-Dimethoxy-1,1′-binaphthalene.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Liu, Yue-Jin published the artcileNi(II)/BINOL-catalyzed alkenylation of unactivated C(sp³)-H bonds, Product Details of C22H18O2, the publication is Chemical Communications (Cambridge, United Kingdom) (2015), 51(37), 7899-7902, database is CAplus and MEDLINE.

The first nickel-catalyzed alkenylation of unactivated C(sp³)-H bonds with vinyl iodides is described. The catalytic system comprises an inexpensive and air-stable Ni(acac)₂ as the catalyst and BINOL as the ligand, which is highly efficient for the alkenylation of β-Me C(sp³)-H bonds of a broad range of aliphatic carboxamides. The resulting olefins can serve as versatile handles for further preparation Addnl., we also demonstrated the synthesis of functionalized carboxamides bearing α-quaternary carbon centers from simple pivalamide via nickel-catalyzed sequential C(sp³)-H bond functionalization.

Chemical Communications (Cambridge, United Kingdom) published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C22H18O2, Product Details of C22H18O2.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem

Ren, Baoyi published the artcileOxybromination of spiro [fluorene-9,9′-xanthene] over 12-tungstophosphoric acid supported on zirconia, HPLC of Formula: 159-62-6, the publication is Yingyong Huaxue (2013), 30(11), 1299-1303, database is CAplus.

A catalyst for the oxybromination of spiro [fluorene-9,9′-xanthene], 12-tungstophosphoric acid (TPA) supported on zirconia, was prepared Effects of TPA loading and activation temperature on the structure of the catalyst and the catalytic performance for oxybromination of spiro [fluorine-9,9′-xanthene] (SFX) have been investigated. The results of XRD and FTIR anal. show that the monoclinic zirconia transformed to tetragonal phase with the increase of TPA loading and calcinations temperature A preliminary study on catalysts with 15% ( mass fraction) TPA indicated that calcination at 300°C could greatly enhance the stability of catalyst. The bromination position of the products was confirmed in the position of 2 of SFX from NMR.

Yingyong Huaxue published new progress about 159-62-6. 159-62-6 belongs to naphthyridine, auxiliary class Other Aromatic Heterocyclic,Spiro, name is Spiro[fluorene-9,9′-xanthene], and the molecular formula is C25H16O, HPLC of Formula: 159-62-6.

Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem