- Synthesis of Biphenylenes and Their Higher Homologues by Cyclization of Aryne Derivatives
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This investigation demonstrates that a series of biphenylenes can be easily prepared from their corresponding halobiphenyls by the cyclization of in situ generated 2′,3′-didehydro-2-lithiobiphenyls at low temperature. Two remarkable advantages of this synthetic method include 1) the lack of any need for transition-metal catalysts or reagents in the cyclization, and 2) the ability to obtain C1-functionalized products by treating the reaction intermediate 1-lithiobiphenylene with an electrophilic reagent. π-Extended derivatives, such as benzobiphenylenes, dibenzobiphenylene, linear/angular [3]phenylenes, and biphenyleno[2,3-b]biphenylenes, were synthesized similarly using suitable biaryls or teraryls.
- Wang, Sheng-Li,Pan, Ming-Lun,Su, Wei-Siang,Wu, Yao-Ting
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supporting information
p. 14694 - 14697
(2017/10/23)
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- NEW COMPOUNDS AND ORGANIC LIGHT EMITTING DEVICE USING THE SAME
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The present invention relates to a novel compound and an organic luminescent device containing the novel compound in an organic compound layer, wherein the compound improves the life, efficiency, electrochemical stability, and thermal stability of the organic luminescent device. In chemical formula 1, R1 and R2 are selected from a group consisting of an alkyl group having 1-10 carbons and an aryl group having 6-30 carbons.
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Paragraph 0129-0132
(2017/04/19)
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- BIPHENYL-4-YL-SULFONIC ACID ARYLAMIDES AND THEIR USE AS THERAPEUTIC AGENTS
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The present invention pertains generally to the field of therapeutic compounds, and more specifically to certain aryl sulfonamides and related compounds (collectively referred to herein as "BPSAAA compounds"), as described herein, and including, for example, biphenyl-4-sulfonic acid (hydroxyalkyl-phenyl)-amides and related compounds. The present invention also pertains to pharmaceutical compositions comprising such compounds, and the use of such compounds and compositions, both in vitro and in vivo, in treatment and/or prevention, for example, of inflammation and/or joint destruction and/or bone loss; of disorders mediated by excessive and/or inappropriate and/or prolonged activation of the immune system; of, inflammatory and autoimmune disorders, for example, rheumatoid arthritis, psoriasis, psoriatic arthritis, chronic obstructive pulmonary disease (COPD), atherosclerosis, inflammatory bowel disease, ankylosing spondylitis, and the like; of disorders associated with bone loss, such as bone loss associated with excessive osteoclast activation in rheumatoid arthritis, osteoporosis, cancer associated bone disease, Paget's disease and the like.
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Page/Page column 62-63
(2008/12/07)
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- PYRIMIDINE DERIVATIVES AND HERBICIDES CONTAINING THE SAME
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The present invention provides a pyrimidine derivative represented by the formula: wherein R1p and R1q are the same or different, and each represents (1)hydrogen, (2)halogen, (3) a C1-6alkyl group which may be substituted or (4) a C1-6alkoxy group, and so on, R2 is halogen, a C1-6alkyl group, cyano group, and so on, Ar is a phenyl group which may be substituted or is a condensed hetero ring which may be substituted, which has excellent selective herbicidal activity, and a herbicide containing the derivative.
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