公开(公告)号：EP0708165A1

公开(公告)日：1996-04-24

申请号：EP95116434.2

申请日：1995-10-18

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

发明人： Sekine, Chizu ,  Yamamoto, Kyoko ,  Fujisawa, Koichi ,  Fujimoto, Yukari ,  Matsumoto, Tsutomu ,  Minai, Masayoshi

IPC分类号： C09K19/34 ,  C09K19/46 ,  C09K19/42

CPC分类号： C09K19/345 ,  C09K19/46

摘要： A ferroelectric chiral smectic liquid crystal mixture comprising at least one compound of the formula (I):

wherein R₁₁ and R₁₂ represent, independently each other, a C₁-C₂₀ alkyl, alkoxy or alkoxyalkyl group which may be substituted by at least one halogen atom and may have an unsaturated bond; A₁₁, A₁₂ and A₁₃ represent, independently each other, a phenylene group which may be substituted by a fluorine atom, or the like; * indicates an asymmetric carbon atom; Z is a hydrogen atom or a fluorine atom; n is an integer of 0 to 10; r, s, t and u are each 0 or 1, provided that when u is 1, the compound (I) is a trans-olefin, and at least one compound of the formula (II):

wherein R₂₁ is a saturated or unsaturated C₃-C₂₀ alkyl group or a saturated or unsaturated C₃-C₂₀ alkoxyalkyl group; A₂₁, A₂₂ and A₂₃ represent, independently each other, a phenylene group which may be substituted by a fluorine atom or the like; X₂ is -C≡C- or the like; Z is a hydrogen atom or a fluorine atom; n is an integer of 1 to 10; m is 0 or 1; and * indicates an asymmetric carbon atom, which liquid crystal mixture has a high response speed and a small dependency of τ-V min characteristic on temperature and a wide temperature driving margin.

摘要翻译： 一种铁电手性近晶液晶混合物，其包含至少一种式（I）化合物：其中R 11和R 12彼此独立地表示可被至少一个取代基取代的C 1 -C 20烷基，烷氧基或烷氧基烷基 可以具有不饱和键; A11，A12和A13彼此独立地表示可被氟原子取代的亚苯基等; *表示不对称碳原子; Z是氢原子或氟原子; n为0〜10的整数。 r，s，t和u各自为0或1，条件是当u为1时，化合物（I）为反式烯烃，至少一种式（II）化合物：其中R 21为 饱和或不饱和的C 3 -C 20烷基或饱和或不饱和的C 3 -C 20烷氧基烷基; A21，A22和A23彼此独立地表示可被氟原子等取代的亚苯基; X 2是-C IDENTICAL C-等; Z是氢原子或氟原子; n为1〜10的整数。 m为0或1; 和*表示不对称碳原子，该液晶混合物具有高响应速度和对τ-Vmin特性对温度和宽温度驱动裕度的较小依赖性。

公开(公告)号：EP0634409A1

公开(公告)日：1995-01-18

申请号：EP94110888.8

申请日：1994-07-13

申请人： SUMITOMO CHEMICAL COMPANY, LIMITED

发明人： Higashii, Takayuki ,  Ushio, Hideki ,  Fujimoto, Yukari ,  Matsumoto, Tsutomu ,  Minai, Masayoshi ,  Yasunaga, Katsuichi ,  Sogabe, Hiroshi ,  Kotera, Takahiro

IPC分类号： C07D311/24

CPC分类号： C07D311/24

摘要： There is disclosed a process of producing a 2-cyano-4-oxo-4H-benzopyran compound of the general formula (2):

wherein R¹ and R² are independently hydrogen, halogen, hydroxy, C₁-C₅ alkyl, C₁-C₅ alkoxy, nitro or a group of the RCONH wherein R is C₁-C₂₀ alkyl, phenyl, phenyl-substituted (C₁-C₂₀)alkyl, phenyl(C₁-C₂₀)alkoxyphenyl or (C₁-C₂₀)alkoxyphenyl. This production process is characterized in that a carboxamide of the general formula (1):

wherein R¹ and R² are each as defined above, is reacted with a dehydrating agent in the presence of a pyridine compound of the general formula (4):

wherein A¹ and A² are independently hydrogen or C₁-C₅ alkyl. If the final product cannot be obtained as crystals having good filtration properties by ordinary treatments, a novel technique as disclosed herein can provide such crystals by dissolving the reaction product in an organic solvent insoluble or slightly soluble in water; pouring the resultant solution into water; and removing the organic solvent by distillation with stirring to effect the crystallization of the final product.

摘要翻译： 公开了通式（2）的2-氰基-4-氧代-4H-苯并吡喃化合物的制备方法：其中R 1和R 2独立地是氢，卤素，羟基，C 1 C 1 -C 20烷氧基，硝基或其中R是C 1 -C 20烷基，苯基，苯基取代的（C 1 -C 20）烷基，苯基（C 1 -C 20）烷氧基苯基或（C 1 -C 20）烷氧基苯基 。 该制备方法的特征在于通式（1）的羧酰胺：其中R 1和R 2各自如上所定义，其中R 1和R 2分别与脱水剂在吡啶化合物 通式（4）：其中A 1和A 2独立地是氢或C 1 -C 5烷基。 如果通过常规处理不能获得具有良好过滤性能的结晶的最终产品，则本文公开的新技术可以通过将反应产物溶解在不溶于或微溶于水的有机溶剂中来提供这种晶体; 将所得溶液倒入水中; 并在搅拌下通过蒸馏除去有机溶剂以实现最终产物的结晶。