59214-70-9Relevant articles and documents
Triple Oxa[7]helicene with Circularly Polarized Luminescence: Enhancing the Dissymmetry Factors via Helicene Subunit Multiplication
Zhou, Fulin,Huang, Zhenmei,Huang, Zhongyan,Cheng, Rui,Yang, Yudong,You, Jingsong
, p. 4559 - 4563 (2021)
The development of multiple heterohelicenes with a high luminescence dissymmetry factor (glum) is an appealing yet challenging task. Herein, we disclose the synthesis of a structurally unusual furan-based triple oxa[7]helicene, which represents the first reported triple hetero[7]helicene, via [2+2+2] cyclotrimerization/intramolecular dehydrogenative annulation. Compared to the reported double oxa[7]helicene, the triple oxa[7]helicene exhibits an improved glum value of 1.8 × 10-3, exemplifying the potential of the helicene subunit multiplication approach to enhance the glum of heterohelicenes.
Anti and Syn Eliminations from 2,3-Dihalo-2,3-dihydrobenzofurans. The Role of the Substrate Structure and the Base-Solvent System on the Reaction Mechanism
Baciocchi, Enrico,Ruzziconi, Renzo,Sebastiani, Giovanni V.
, p. 6114 - 6120 (1983)
The anti and syn β-eliminations from a series of 31 2,3-dihalo-2,3-dihydrobenzofurans (to give 3-halobenzofuran) have been kinetically investigated in t-BuOK-t-BuOH, in the presence and in the absence of 18-crown-6 ether (18C6), and in EtOK-EtOH.Reaction mechanisms have been assigned on the basis of leaving group, kinetic deuterium isotope, ring substituent (5-chlorine), and β-halogen effects.These data have provided information concerning structure and solvent effect on the mechanism of β-elimination reactions that lead to the following conclusions: (a) an E1cBI mechanism is likely to be operating, regardless of stereochemistry, with chlorine as β-activating atom and fluorine as the leaving group and (b) an E2 reaction is likely to be operating for the opposite structural situation, i. e., with β-fluorine activation and chlorine as the leaving group.The mechanism is likely to change from E2 to E1cBI as the reaction stereochemistry changes from anti to syn and as we move from EtOK-EtOH to t-BuOK-t-BuOH and from here to t-BuOK-t-BuOH-18C6.
A series of π-extended thiadiazoles fused with electron-donating heteroaromatic moieties: Synthesis, properties, and polymorphic crystals
Kato, Shin-Ichiro,Furuya, Takayuki,Nitani, Masashi,Hasebe, Naoya,Ie, Yutaka,Aso, Yoshio,Yoshihara, Toshitada,Tobita, Seiji,Nakamura, Yosuke
, p. 3115 - 3128 (2015)
π-Extended thiadiazoles 4-8 fused with various electron-donating heteroaromatic moieties have been designed and synthesized. Just like thiadiazoles 1-3 synthesized previously, 4-8 exhibit intramolecular charge-transfer (CT) interactions, moderate-to-good fluorescence quantum yields of up to 0.78, and electrochemical amphoterism. In comparison with 1-3, the benzannulation in thiadiazoles 4-7 moderately extends the p conjugation and significantly increases the stability of the cationic species formed upon electrochemical oxidation. The fluorescence quantum yields increase remarkably from 3 to 6 and 7 due to the efficient suppression of nonradiative intersystem crossing resulting from the benzannulation. The properties of 4-8 strongly reflect the different species annulated to the pyrrole rings, namely benzothiophene, naphthalene, and benzofuran. Eleven crystals, including poly- and pseudopolymorphic crystals of 1 (1-Crys.(Y ) and 1-Crys.(G)), 2 (2-Crys.(O) and 2-Crys.(G)), 4 (4-Crys.(O) and 4-Crys. (G)), and 6 (6-Crys.(O) and 6-Crys.(G)), were obtained and characterized by X-ray crystallography. The fluorescence colors and efficiencies are distinct for each poly- and pseudopolymorph of 1, 2, 4, and 6. It has been suggested that both the extent of the electronic interactions in the π-stacked dimers and the presence of excitonic interactions originating in the 1D face-to-face slipped columns affect the fluorescence wavelengths of the poly- and pseudopolymorphs.
GLUE DEGRADERS AND METHODS OF USE THEREOF
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Page/Page column 318, (2021/04/01)
Described herein are glue degrader compounds, their various targets, their preparation, pharmaceutical compositions comprising them, and their use in the treatment or prevention of conditions, diseases, and disorders mediated by various target proteins.
Room Temperature C-H Arylation of Benzofurans by Aryl Iodides
Mayhugh, Amy L.,Luscombe, Christine K.
supporting information, p. 7079 - 7082 (2021/09/18)
A robust method of room temperature direct arylation for benzofuran is reported. This discovery allows for mild arylation by commercially available aryl iodides with complete C-2 regioselectivity and tolerates a range of functional groups, including heat sensitive groups. Mechanistically, a Heck-type oxyarylation product from a direct arylation process is reported as a key piece of evidence for a carbopalladation intermediate.
Thermally activated delayed fluorescent deep blue light material and preparation method thereof with organic electroluminescent device
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Paragraph 0091-0095; 0097-0101, (2022/01/08)
The present invention discloses a thermal activation delayed fluorescent deep blue light material and preparation method thereof and an organic electroluminescent device, the thermal activation delayed fluorescent deep blue light material having the follo
POLYCYCLIC AROMATIC DERIVATIVE COMPOUNDS AND ORGANIC LIGHT-EMITTING ELEMENTS USING THE SAME
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Paragraph 0108; 0113-0116, (2020/06/30)
PROBLEM TO BE SOLVED: To provide: organic light-emitting compounds used in organic layers of organic light-emitting elements and capable of realizing efficient and long-lasting organic light-emitting elements; and organic light-emitting elements comprising the same. SOLUTION: An organic light-emitting compound is such that Q1 to Q3 are linked by linkers Y and X at specific positions, where Q1 to Q3 are identical to or different from each other and each independently a substituted or unsubstituted C6-50 aromatic hydrocarbon ring or a substituted or unsubstituted C2-50 heteroaromatic ring; each of the linkers Y is one selected from among N-R1, CR2R3, O, S, Se and SiR4R5; the multiple linkers Y are identical to or different from each other; and X is one selected from among B, P and P=O. SELECTED DRAWING: None COPYRIGHT: (C)2020,JPOandINPIT
POLYCYCLIC AROMATIC COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICES USING THE SAME
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Paragraph 0074-0075, (2020/06/29)
Disclosed are polycyclic aromatic compounds that can be employed in various organic layers of organic electroluminescent devices. Also disclosed are organic electroluminescent devices including the polycyclic aromatic compounds. The organic electroluminescent devices are highly efficient and long lasting and have greatly improved luminous efficiency.
ORGANIC COMPOUND AND ORGANIC LIGHT EMITTING DIODE INCLUDING SAME
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Paragraph 0291; 0295-0297, (2020/12/31)
Disclosed herein are an organic light emitting compound represented by [Chemical Formula 1] below and an organic light emitting diode comprising same. In [Chemical Formula 1], the substituents R1 to R5, R11 to R18, R21 to R22, and R31 to R40, the linkers L1 to L3, and m1 and m2 are as defined in the description:.
ORGANIC ELECTROLUMINESCENT DEVICE
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Paragraph 0080-0081, (2020/12/30)
Disclosed is an organic electroluminescent device that employs a compound represented by Formula A-1 or A-2: and a compound represented by Formula B: The organic electroluminescent device has excellent luminescent properties such as high color purity and long lifetime.
