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    • 4. 发明授权
    • Dibenzothiophene oxide compound, and process for producing the same
    • 二苯并噻吩氧化物,及其制造方法
    • US07135579B2
    • 2006-11-14
    • US10873211
    • 2004-06-23
    • Chizu SekineMasamitsu IshitobiKoichi FujisawaKazunori IwakuraMasayoshi Minai
    • Chizu SekineMasamitsu IshitobiKoichi FujisawaKazunori IwakuraMasayoshi Minai
    • C07D333/76
    • C09K19/3059C07D333/76C09K19/18C09K19/3491C09K19/42C09K2019/0448C09K2019/0496C09K2019/188Y10T428/10
    • There are disclosed novel compounds, liquid crystal compositions, polymers, optically anisotropic producgs, and optical or liquid crystal elements that have large refractive index anisotropy, mix easily with other liquid crystals, have advantageous stability against light, and exhibit absorption at practically short wavelength in the ultraviolet region. The compounds are represented by the formula (1) and have a phenylacetylene structure, wherein difference ΔE in energy of HOMO of parts (1-1), (1-2) and (1-3) calculated by the method of molecular orbitals is not less than 0.3 electronvolt, and the polarizability anisotropy Δα of a molecule represented by the formula (1) calculated in the same way is not lower than 500 A.U.: P1—H  (1-2) P2—H  (1-3) (A1 to A4: H, F, alkyl or alkoxy group of C1 to C10 optionally substituted with F; P1, P2: structure fulfilling the conditions of HOMO energy and polarizability).
    • 公开了具有大的折射率各向异性,容易与其他液晶混合的新型化合物,液晶组合物,聚合物,光学各向异性产物和光学或液晶元件,对光具有有利的稳定性,并且在实际短波长下表现出吸收 紫外线区域。 化合物由式(1)表示并具有苯乙炔结构,其中通过分子轨道方法计算的部分(1-1),(1-2)和(1-3)的HOMO的能量差ΔE为 不小于0.3电子伏特,并且以相同方式计算的由式(1)表示的分子的极化率各向异性Δalpha不低于500AU:<?in-line-formula description =“In-line Formulas”end = “lead”?> P <1> H(1-2)<?in-line-formula description =“In-line Formulas”end =“tail”?> <?in-line-formula 描述=“在线公式”end =“lead”?> P <2> -H(1-3)<?in-line-formula description =“In-line Formulas”end =“tail (A 1至A 4):任选被F取代的C至C 10的H,F,烷基或烷氧基; P 1, ,满足HOMO能量和极化率条件的结构)。
    • 9. 发明授权
    • Process for the preparation of carboxylic acid esters
    • 羧酸酯的制备方法
    • US07741511B2
    • 2010-06-22
    • US11837399
    • 2007-08-10
    • Hiroshi SoudaKazunori Iwakura
    • Hiroshi SoudaKazunori Iwakura
    • C07C69/24
    • C07C67/08B01J31/0212C07F7/003C07C69/747
    • There is provided a process for preparing a carboxylic acid ester of formula (3): R2COOR1  (3) wherein R1 is an alkyl group which may be substituted, an alkenyl group which may be substituted, an alkynyl group which may be substituted, an aralkyl group which may be substituted, or a heteroarylalkyl group which may be substituted, and R2 is an alkyl group which may be substituted, an alkenyl group which may be substituted, an alkynyl group which may be substituted, an aryl group which may be substituted, a heteroaryl which may be substituted, an aralkyl group which may be substituted, or a heteroarylalkyl group which may be substituted, which process is characterized by the steps of reacting a monohydroxy compound of formula (1): R1OH  (1) wherein R1 is as defined above, with a zirconium compound of formula (6): Zr(OR8)4  (6) wherein R8 is an alkyl group or an aryl group which may be substituted and is not the same as R1, to prepare a zirconium catalyst, and reacting a carboxylic acid of formula (2): R2COOH  (2) wherein R2 is as defined above, with the monohydroxy compound of formula (1) in the presence of the zirconium catalyst.
    • 提供了制备式(3)的羧酸酯的方法:R2COOR1(3)其中R1是可被取代的烷基,可被取代的烯基,可被取代的炔基,芳烷基 可以被取代的基团,或可以被取代的杂芳基烷基,R 2可以被取代的烷基,可以被取代的链烯基,可被取代的炔基,可被取代的芳基, 可以被取代的杂芳基,可被取代的芳烷基或可被取代的杂芳烷基,该方法的特征在于以下步骤:使式(1)的单羟基化合物:R1OH(1)其中R1为 与式(6)的锆化合物:Zr(OR8)4(6)其中R8是可以被取代且与R1不同的烷基或芳基,制备锆催化剂,以及 反应一个碳 式(2)的二甲酸:其中R 2如上所定义的R 2 COOH(2)与式(1)的单羟基化合物在锆催化剂存在下反应。