- Synthetic method of 4-hydroxyindole
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The invention belongs to the technical field of organic synthesis, and particularly relates to a synthetic method of 4-hydroxyindole. Aiming at the problems existing in industrial production of 4-hydroxyindole in the prior art, the technical scheme of the invention is as follows: the method comprises the following steps: (1) protecting hydroxyl in a compound 3 by using a protective group to obtaina compound 4; (2) reacting the compound 4 with N, N-dimethylformamide dimethyl acetal to obtain a compound 5; (3) mixing the compound 5 with NH2NH2.H2O and MeOH, and carrying out a reaction to obtaina compound 6; and (4) removing the protective group of the compound 6 to obtain 4-hydroxyindole. According to the method for synthesizing 4-hydroxyindole, the cost of starting materials is low, the reaction conditions in the synthesis process are mild, operation is convenient, aftertreatment is simple, and the yield is high.
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- COMPOUNDS, COMPOSITIONS, AND METHODS FOR MODULATING CFTR
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The present disclosure is directed to disclosed compounds that modulate, e.g., address underlying defects in cellular processing of CFTR activity.
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Paragraph 0209
(2017/08/01)
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- Protective Agent for Retinal Neuronal Cell Comprising Indazole Derivative as Active Ingredient
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As a result of intensive studies for the purpose of finding a new medicinal use of an indazole derivative, it was found that an indazole derivative inhibits glutamate-induced retinal neuronal cell death in rat fetal retinal neuronal cells, in other words, the indazole derivative acts directly on the retinal neuronal cells and exhibits an effect of protecting retinal neuronal cells. Accordingly, the indazole derivative is useful for the prevention or treatment of an eye disease associated with retinal neuronal cell damage or retinal damage.
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Page/Page column 9-10
(2009/01/23)
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- PROTECTIVE AGENT FOR RETINAL NEURONAL CELL COMPRISING INDAZOLE DERIVATIVE AS ACTIVE INGREDIENT
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As a result of intensive studies for the purpose of finding a new medicinal use of an indazole derivative, it was found that an indazole derivative inhibits glutamate-induced retinal neuronal cell death in rat fetal retinal neuronal cells, in other words, the indazole derivative acts directly on the retinal neuronal cells and exhibits an effect of protecting retinal neuronal cells. Accordingly, the indazole derivative is useful for the prevention or treatment of an eye disease associated with retinal neuronal cell damage or retinal damage.
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Page/Page column 14
(2010/11/29)
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- NOVEL INDAZOLE DERIVATIVE
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An object of the present invention is to create a novel indazole derivative useful as a drug and to find a novel pharmacological action of the derivative. The compound of the present invention is represented by the formula [I] and has an excellent Rho kinase inhibiting action. In the formula, a ring X is a benzene ring or a pyridine ring; R1 and R2 are H or alkyl; R3 and R4 are halogen, H, OH, alkoxy, alkenyloxy, alkynyloxy, cycloalkyloxy, cycloalkenyloxy, aryloxy, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, aryl, carboxy, hydrocarbonyl, alkylcarbonyl, etc.; and R5 is halogen atom, H, OH, alkoxy, aryloxy, alkyl or aryl. Each group can be substituted.
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Page/Page column 42
(2008/06/13)
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- KINASE MODULATORS AND METHODS OF USE
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The present invention relates to compounds of the Formula I and II wherein R, R21, R25-R33, m, n, X21-X23, and Q1 are defined herein. The compounds modulate protein kinase enzymatic activity to modulate cellular activities such as proliferation, differentiation, programmed cell death, migration and chemoinvasion. Compounds of the invention inhibit, regulate and/or modulate kinases, particularly p70S6 and/or Akt kinases. Methods of using and preparing the compounds, and pharmaceutical compositions thereof, to treat kinase-dependent diseases and conditions are also an aspect of the invention.
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Page/Page column 119
(2010/02/15)
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- SYNTHESIS OF 4-SUBSTITUTED INDOLES FROM o-NITROTOLUENES
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A facile two- or three-step transformation of o-nitrotoluenes into 4-substituted indoles is described.Treatment of o-nitrotoluenes 1 with DMF acetal, or sometimes more advantageously with tris(N,N-dimethylamino)methane, affords β-(N,N-dimethylamino)styrenes 2 which are readily converted too-nitrophenylacetaldehyde semicarbazones 3 without isolation.Reduction of either 2 or 3 affords 4-substituted indoles 4.Use of the very insoluble semicarbazones results in vastly superior yields of 4 by minimizing completing bimolecular condensation reactions during reduction.This new procedure has been applied to efficiently and conveniently prepare a series of 4-substituted indoles 4.
- Kruse, Lawrence I.
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p. 1119 - 1124
(2007/10/02)
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