申请人:Nippon Mining Co., Ltd.
公开号:US05098602A1
公开(公告)日:1992-03-24
This invention provides a novel halogen-containing ester compound represented by the following general formula (I): ##STR1## (wherein R is an alkyl group, A is selected from a single bond, --O--, --COO-- and --CO--, both of X and Y are halogen atoms or either one of X and Y is a halogen atom and the other is a hydrogen atom, each of m and n is 0 or 1, m+n=0 or 1, each of k and l is an integer of 1 or more, provide k<l), a liquid crystal composition and a light switching element each containing the above compound as well as a novel fluorophenol compound represented by the following general formula (II): ##STR2## (wherein each of k and l is an integer of 1 or more, provided k<l) as an intermediate for the synthesis of the above ester compound and a method of producing the same.
这项发明提供了一种新颖的含卤酯基化合物,其通式为(I):##STR1##(其中R是烷基,A从单键、-O-、-COO-和-CO-中选择,X和Y均为卤素原子或X和Y中的一个为卤素原子另一个为氢原子,m和n分别为0或1,m+n=0或1,k和l分别为1或更多的整数,提供k
Halogen-containing, optically active liquid crystal compound and liquid crystal composition containing same
申请人:Chisso Corporation
公开号:EP0197677A2
公开(公告)日:1986-10-15
A novel optically active liquid crystal compound and a liquid crystal composition containing the same are provided, which compound is expressed by the formula
wherein R1 is alkyl or alkoxy of 4 - 18 C; R2 is alkyl, alkoxy, acyl or alkoxymethyl of 4 - 18C; but either one of R1 or R2 is an optically active group; either one of X1 or X2 is halogen atom and the other is H; m and n each are 0 or 1 and m+n is 0 or 1.
本发明提供了一种新型光学活性液晶化合物和含有该化合物的液晶组合物,该化合物由式表示 其中 R1 是 4 - 18C 的烷基或烷氧基;R2 是 4 - 18C 的烷基、烷氧基、酰基或烷氧基甲基;但 R1 或 R2 中的任一个是光学活性基团;X1 或 X2 中的任一个是卤素原子,另一个是 H;m 和 n 各为 0 或 1,m+n 为 0 或 1。
Optically active carboxylic acid derivatives and liquid crystalline compositions comprising them
申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP0231853A2
公开(公告)日:1987-08-12
An optically active carboxylic acid derivative represented by the general formula
wherein R represents a normal alkyl group having l to 20 carbon atoms, m and n represent 0 or l but are not l at the same time, X represents a hydrogen or halogen atom, Y represents a hydrogen or fluorine atom, provided that when Y is a hydrogen atom, X is a halogen atom, and that when n is 0, Y is a hydrogen atom, and Q* represents an optically active alkyl or l-alkoxyethyl group having an asymmetric carbon atom.
由通式表示的光学活性羧酸衍生物
其中 R 代表具有 l 至 20 个碳原子的普通烷基,m 和 n 代表 0 或 l,但不同时为 l,X 代表氢原子或卤素原子,Y 代表氢原子或氟原子,条件是当 Y 为氢原子时,X 为卤素原子,当 n 为 0 时,Y 为氢原子,Q* 代表具有不对称碳原子的光学活性烷基或 l-烷氧基乙基。
Novel halogen-containing ester compounds, and their intermediates, and method of producing the same as well as liquid crystal compositions containing the same and light switching elements
申请人:JAPAN ENERGY CORPORATION
公开号:EP0341686A2
公开(公告)日:1989-11-15
This invention provides a novel halogen-containing ester compound represented by the following general formula ( I ):
(wherein R is an alkyl group, A is selected from a single bond, -O-, -COO- and -CO-, both of X and Y are halogen atoms or either one of X and Y is a halogen atom and the other is a hydrogen atom, each of m and n is 0 or 1, m+n=0 or 1, each of k and ℓ is an integer of 1 or more, provide k<ℓ), a liquid crystal composition and a light switching element each containing the above compound as well as a novel fluorophenol compound represented by the following general formula ( II ):
(wherein each of k and ℓ is an integer of 1 or more, provided k<ℓ) as an intermediate for the synthesis of the above ester compound and a method of producing the same.
本发明提供了一种新型含卤素酯化合物,由以下通式( I )表示:
(其中 R 为烷基,A 选自单键、-O-、-COO- 和 -CO-,X 和 Y 均为卤素原子或 X 和 Y 中的一个为卤素原子而另一个为氢原子,m 和 n 中的每个均为 0 或 1,m+n=0 或 1、其中 k 和 ℓ 各为 1 或 1 以上的整数,提供 k<ℓ)、液晶组合物和光开关元件,每种组合物和光开关元件都含有上述化合物以及由下式通式 ( II ) 表示的新型氟苯酚化合物:
(其中 k 和 ℓ 均为 1 或 1 以上的整数,条件是 k<ℓ)作为合成上述酯类化合物的中间体以及生产上述酯类化合物的方法。
Anti-virulence compositions and methods
申请人:Case Western Reserve University
公开号:US10227282B2
公开(公告)日:2019-03-12
A method of reducing the virulence of a bacterium that expresses accessory gene regulator A (AgrA) includes administering to the bacterium an amount of AgrA antagonist effective to inhibit the synthesis of one or more virulence factors by the bacterium.
一种降低表达附属基因调节剂 A(AgrA)的细菌毒力的方法,包括向该细菌施用一定量的 AgrA 拮抗剂,以有效抑制该细菌合成一种或多种毒力因子。
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