摘要:
Dry developable top surface imageable photoresist compositions which comprise, in admixture, a film-forming aromatic polymer resin activated to electrophilic substitution, an acid catalyzable agent capable of being inserted into the aromatic polymer resin, and a radiation degradable acid generating compound and processes for generating positive tone resist images on substrates therewith.
摘要:
Compounds of the formula (I) R.sup.1 --(A.sup.1).sub.a (--M.sup.1).sub.b --(--A.sup.2).sub.c (--M.sup.2).sub.d (--A.sup.3).sub.e (--M.sup.3).sub.f (--A.sup.4).sub.g --H(I) in which the symbols and indices have the following meanings: R.sup.1 is B or a straight-chain or branched alkyl radical having 1 to 22 carbon atoms (with or without an asymmetrical carbon atom) in which, in addition, it is possible for one or two non-adjacent --CH.sub.2 -- groups to be replaced by --O--, --S--, --CO--, --CO--O--, --O--CO--, --CO--S--, --S--CO--, --O--CO--O--, --CH.dbd.CH--, --C.tbd.C--, .DELTA. or --Si(CH.sub.3).sub.2 --, and in which, in addition, one or more hydrogen atoms of the alkyl radical may be substituted by F, Cl, Br or CN, or is a chiral group, for example an epoxide, a dioxolane or a cyclic lactone, --(A.sup.1).sub.a (--M.sup.1).sub.b --(--A.sup.2).sub.c (--M.sup.2).sub.d (--A.sup.3).sub.e (--M.sup.3).sub.f (--A.sup.4).sub.g -- is a system comprising 1 to 4 rings (cyclohexane, aromatic or heterocyclic), it being possible for the system to be linked in different ways. The compounds according to the invention increase the response speed of liquid-crystal mixtures.
摘要:
An aromatic compound of the formula (I)R.sup.1 (--A.sup.1).sub.a (--M.sup.1).sub.b (--A.sup.2).sub.c (--M.sup.2).sub.d --B(--M.sup.3).sub.c (--A.sup.3).sub.f (--M.sup.4).sub.g (--A.sup.4).sub.h --R.sub.2 (I)in whichB is one of the two following aromatic groups: ##STR1## Q.sup.1, Q.sup.2, Q.sup.3 and Q.sup.4 are identical or different and are CH.sub.2, CF.sub.2, N--R.sup.3, S, O or C.dbd.O;P.sup.1, P.sup.2 and P.sup.3 are identical or different and are C--H, C--F or N; andthe remaining symbols and indicies define mesogenic radicals, The compounds are suitable as components of liquid-crystalline mixtures.
摘要:
Thiadiazole derivatives of the formula (I) X-B-A.sup.1 -(M.sup.1 -A.sup.2 -).sub.m (M.sup.2 -A.sup.3).sub.n -R.sup.1(I) in which the symbols and indices have the following meanings: X is Cl, Br or I; B is 1,3,4-thiadiazole-2,5-diyl; A.sup.1, A.sup.2 and A.sup.3 are identical or different and are substituted or unsubstituted 1,4-phenylene, pyrazine-2,5-diyl, pyridazine-3,6-diyl, pyridine-2,5-diyl, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene, 1,3,4-thiadiazole-2,5-diyl, 1,3-dioxane-2,5-diyl, 1,3-dithiane-2,5-diyl, 1,3-thiazole-2,4-diyl, 1,3-thiazole-2,5-diyl, thiophene-2,4-diyl, thiophene-2,5-diyl, piperazine-1,4-diyl, piperazine-2,5-diyl, naphthalene-2,6-diyl, bicyclo�2.2.2!octane-1,4-diyl, or 1,3-dioxaborinane-2,5-diyl; M.sup.1 and M.sup.2 are identical or different and are --CO--O--, --O--CO--, --O--CO--O--, --O--CS--O--, --CH.sub.2 --O--, --O--CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or a single bond; R.sup.1 is --O-benzyl, H, an alkyl group having 1 to 12 carbon atoms or an alkoxy group having 1 to 12 carbon atoms; m and n are 0 or 1. The novel compounds allow the synthesis of a wide range of 1,3,4-thiadiazole derivatives, as employed, for example, as components of liquid-crystal mixtures, in a significantly reduced number of synthesis steps.
摘要翻译:式(I)X-B-A1-(M1-A2-)m(M2-A3)n -R1(I)的噻二唑衍生物,其中符号和指数具有以下含义:X为Cl,Br或I; B是1,3,4-噻二唑-2,5-二基; A1,A2和A3相同或不同,为取代或未取代的1,4-亚苯基,吡嗪-2,5-二基,哒嗪-3,6-二基,吡啶-2,5-二基,嘧啶-2,5-二基, 二,反-1,4-亚环己基,1,3,4-噻二唑-2,5-二基,1,3-二恶烷-2,5-二基,1,3-二噻烷-2,5-二基, 3-噻唑-2,4-二基,1,3-噻唑-2,5-二基,噻吩-2,4-二基,噻吩-2,5-二基,哌嗪-1,4-二基,哌嗪-2, 双环[2.2.2]辛烷-1,4-二基或1,3-二氧杂硼杂环壬烷-2,5-二基; M 1和M 2相同或不同,为-CO-O-,-O-CO-,-O-CO-O-,-O-CS-O-,-CH2-O-,-O-CH2-, CH = CH-,-C 3BOND C-或单键; R 1为-O-苄基,H为碳原子数1〜12的烷基或碳原子数1〜12的烷氧基。 m和n为0或1.新化合物允许合成宽范围的1,3,4-噻二唑衍生物,例如作为液晶混合物的组分,以显着减少数量的合成步骤 。
摘要:
Disclosed are derivatives of fluoroalkylethynyl- and difluoroalkylethynylbenzenes of the formula (I) herein. These compounds exhibit useful properties as liquid crystal compounds and are useful in nematic liquid crystal mixtures.
摘要:
Compounds of formula I ##STR1## in which R.sup.1 and R.sup.2 are, for example, an alkyl chain, A is a mesogenic group, and M is a spacer group, are highly suitable as components of liquid-crystal mixtures.
摘要:
Ferroelectric liquid crystal mixtures containing compounds of the formula (I): ##STR1## wherein R.sup.1 is, for example, a straight-chain or branched alkyl radical having 1 to 22 carbon atoms, in which one --CH.sub.2 -- group may be replaced by --O-- or --CO--O--.
摘要:
A process for preparing polycyclic aromatic compounds by cross-coupling aromatic boronic acids with aromatic halogen compounds or perfluoroalkylsulfonates in the presence of metallic palladium, if desired applied to a support material, as catalyst, wherein the coupling is carried out in the presence of a ligand and a base. The process of the invention allows the yield of polycyclic aromatic compounds to be significantly increased in comparison with processes not using a ligand and thus allows a yield optimum for the Pd(0)-catalyzed cross-coupling of aromatic boronic acids with aromatic halogen compounds to be achieved.
摘要:
A 3,4,5-trifluorobenzene derivatives of formula (I): ##STR1## in which R.sup.1 is a straight-chain or branched alkyl having 1 to 15 carbon atoms in which one or two nonadjacent --CH.sub.2 --groups are optionally replaced by --O--, --CH.dbd.CH--, --C.tbd.C--, cyclopropane-1,2-diyl or --Si(CH.sub.3).sub.2 --, and in which one or more H atoms in the alkyl radical may be substituted by F; A.sup.1, A.sup.2 and A.sup.3 are identical or different 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl in which one or two H atoms are, optionally, replaced by F, trans-1,4-cyclohexylene, 1,3-dioxane-2,5-diyl or naphthalene-2,6-diyl, M.sup.1 and M.sup.2 are identical or different --CH.sub.2 CH.sub.2 --,--CH.dbd.CH--,--C.tbd.C--,--CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 --, --CH.sub.2 --O--,--O--CH.sub.2 --,--CO--O-- or--O--CO; X is --CH.sub.2 --O--,--OCH.sub.2 -- or --O--CO--; and k, l, m, n, o and p are zero or one provided that the sum k+m+o is greater than zero. The substances of the invention are characterized by a good temperature behavior of the nematic phase and good solubility.