292 results about "Biphenyl compound" patented technology

A liquid crystal composition includes a bicyclohexyl compound in an amount of about 35 percent by weight to about 50 percent by weight, a cyclohexyl phenyl compound in an amount of about 15 percent by weight to about 25 percent by weight, a bicyclohexyl phenyl compound in an amount of about 20 percent by weight to about 25 percent by weight, and a cyclohexyl biphenyl compound in an amount of about 15 percent by weight to about 20 percent by weight. The liquid crystal composition can improve the display quality and response time of a liquid crystal display (LCD) apparatus.

This invention provides compounds of formula I:

wherein a, b, c, m, p, s, t, W, Ar¹, X¹, R¹, R², R³, R⁴, R⁶, and R⁷ are as defined specification. The compounds of formula I are muscarinic receptor antagonists. The invention also provides pharmaceutical compositions containing such compounds, processes and intermediates for preparing such compounds and methods of using such compounds to treat pulmonary disorders.

This invention provides compounds of formula I:

wherein a, b, c, m, p, r, R¹, R², R³, R⁴, R⁵, R⁶, W and X¹ are as defined in the specification. The compounds of formula I are muscarinic receptor antagonists. The invention also provides pharmaceutical compositions containing such compounds, processes and intermediates for preparing such compounds and methods of using such compounds to treat pulmonary disorders.

This invention provides compounds of formula I:

wherein a, b, c, d, m, n, p, r, R¹, R², R³, R⁴, R⁵, R⁶, R⁷, and W are as defined in the specification. The compounds of formula I are muscarinic receptor antagonists. The invention also provides pharmaceutical compositions containing such compounds, processes and intermediates for preparing such compounds and methods of using such compounds to treat pulmonary disorders.

This invention provides compounds of formula I:

wherein a, b, c, d, m, n, p, r, R¹, R², R³, R⁴, R⁵, R⁶, R⁷, and W are as defined in the specification. The compounds of formula I are muscarinic receptor antagonists. The invention also provides pharmaceutical compositions containing such compounds, processes and intermediates for preparing such compounds and methods of using such compounds to treat pulmonary disorders.

This invention provides compounds of formula I:

wherein a, b, c, d, m, n, p, s, t, Ar¹, R¹, R², R³, R⁴, R⁶, R⁷, R⁸, and W are as defined in the specification. The compounds of formula I are mescaline receptor antagonists. The invention also provides pharmaceutical compositions containing such compounds, processes and intermediates for preparing such compounds and methods of using such compounds to treat pulmonary disorders.

A system and method for detecting trace explosives is provided that utilizes a lumnescent reagent, such as blue-fluorescent biphenyl compound, to simultaneously detect multiple nitrogen-based explosives on a sample substrate. The test reagent is mixed with a solvent to improve mixing and maximize the dissolution of the reagent and any trace explosives present on the substrate. A thin film of reagent is applied to the substrate either before or after the substrate contacts a sample area to be tested. Heated air is then applied to the substrate to improve the sample reading. A light source is utilized to illuminate the reagent and expose any quenched portions of the substrate that indicate the presence of an explosive. Quenched portions may be detected visually, or utilizing an analyzing apparatus, such as a fluorimeter or camera. A computer may also be utilized to interpret and record test results.

This invention provides an air-enhanced method for preparing biphenyl compounds from chlorinated aromatic hydrocarbons and aryl boric acid by Suzuki crosslinking reaction catalyzed by nanoscale Pd in situ grown in poly(ethylene glycol). The method does not need any ligand, phase transfer agent, promoter or inert gas protection. Catalyzed by nanoscale Pd in situ grown in poly (ethylene glycol), chlorinated aromatic hydrocarbons and aryl boric acid react in a mild condition to obtain biphenyl compounds with a high efficiency. In an optimized condition, the conversion rate of chlorinated aromatic hydrocarbons and the yield of biphenyl compounds are 95-100% and 90-99%, respectively.

A process is described for converting at least one isomer of a dialkyl-substituted biphenyl compound, such as at least one 2,X′ dialkylbiphenyl isomer (where X′ is 2′, 3′ and/or 4′), into at least one different isomer, 3,3′, 3,4′ and/or 4,4′ dialkylbiphenyl isomer. The process comprises contacting a feed comprising the dialkyl-substituted biphenyl compound isomer with an acid catalyst under isomerization conditions.

A photocatalysis synthesis method of biphenyl compounds comprises steps as follows: halogenobenzene compounds, phenylboronic acid compounds and alkaline are uniformly mixed at the mole ratio of 1: (1-2): (1-3) and are sufficiently dissolved by an organic reagent with water volume fraction of 5%-50%, a palladium/silicon carbide catalyst with 0.5%-10% of palladium by weight is added, the mole ratio of palladium and halogenobenzene is (1-30) : 10,000, the mixture is uniformly stirred, and a suspension liquid is obtained; the well dispersed suspension liquid is stirred at the oxygen-free atmosphere at the temperature of 20 DEG-100 DEG C, the mixture is irradiated by visible light for reaction for 30-300 minutes, and the biphenyl compounds can be obtained. The photocatalysis synthesis method has the advantages of environmental protection, low cost, simplicity in operation, short reaction period and high product yield.

A preparing method of a stilbene biphenyl fluorescent brightener comprises performing desalting secondary refining to a filter cake containing the stilbene biphenyl fluorescent brightener; pulping the filter cake; homogenizing serosity through a colloid mill or a high-pressure homogenizer so as to guarantee that fineness of particles in the serosity is 10-100mum; and finally performing spray drying to the serosity to obtain a product. Effective component(s) of the filter cake containing the stilbene biphenyl fluorescent brightener is/are one of or a mixture of a plurality of sulfonyl styryl biphenyl compounds. The preparing method enables the fluorescent brightener having high water solubility at a normal temperature to be obtained, and has the effects of saving energy and reducing production cost.

A method is disclosed for making hydroxy-substituted ethynylated biphenyl compounds and for reacting such compounds with a family of noncross-linking thermosetting poly(arylene ethers) to produce novel poly(arylene ether) compositions which, when cured at glass transition temperatures greater than about 350° C. to form thin films, possess properties such as low dielectric constant, low moisture absorption, and high thermal stability. These films are suitable for use as intermetal dielectrics for multilevel interconnection.

The invention discloses a synthetic method of biphenyl compounds which is prepared through adding alkalis, alcohol and halogenated aromatic compounds into water, mixing it to form microemulsion system, then adding Pd/C as catalyst, reacting 2 to 10h at 50 to 120 DEG C, postprocessing the resultant of reaction to obtain the biphenyl compounds. The present invention is characterized in that using alcohol as additive agent, using lower price Pd catalyst, having features of lower cost, short reaction time, high yield, no pollution and in favor of industrialization.

The invention relates to a synthetic method for 4,4'-dihalogenated-3,3'-dialkyl(alkoxyl) biphenyl compounds. The method employs o-nitro alkyl (alkoxyl) benzene as an initial raw material, 2,2'-dialkyl(alkoxyl) hydrazobenzene is prepared through catalysis hydrogenation in an alkaline environment, hydrochloric acid acidifying rearrangement is carried out, 4,4'-diamino-3,3'-dialkyl(alkoxyl) biphenyl is prepared, finally, a diazotization reaction is carried out and 4,4'-dihalogenated-3,3'-dialkyl(alkoxyl) biphenyl compounds are prepared. The synthetic method is advantaged by cheap and easily available raw materials, mild reaction conditions, simple operation, high safety coefficient, high yield and low cost.

The present invention relates to a liquid crystal (LC) medium comprising a terphenyl compound and at least two polymerizable compounds, to a process for its preparation, to its use for optical, electro-optical and electronic purposes, in particular in LC displays, especially in an LC display of the polymer sustained alignment (PSA) type, and to an LC display, especially a PSA display, comprising it.