27513-35-5Relevant articles and documents
BICYCLIC IMIDAZOLE DERIVATIES USEFUL FOR THE TREATMENT OF RENAL DISEASE, CARDIOVASCULAR DISEASES AND FIBROTIC DISORDERS
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Page/Page column 41, (2018/02/03)
The present invention relates to compounds of formula I: and pharmaceutically acceptable salts thereof, wherein R1, R2, R3, R4, R5 and n are as defined herein. The invention also relates to pharmaceutical compositions comprising these compounds, methods of using these compounds in the treatment of various diseases and disorders, processes for preparing these compounds and intermediates useful in these processes.
A trinexapac-and intermediate preparation method
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Paragraph 0032; 0033; 0043; 0044; 0054; 0055; 0065; 0066, (2017/08/25)
The invention discloses a preparation method of trinexapac-ethyl and an intermediate thereof. The method comprises the following steps: under the action of an alkali, reacting acetoacetic ester (I) with diethyl maleate to obtain an intermediate (II), cont
Method for synthesizing prohexadione calcium and trinexapac-ethyl
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Paragraph 0044; 0050; 0051; 0052; 0053; 0054, (2017/10/07)
The invention discloses a method for synthesizing prohexadione calcium and trinexapac-ethyl. The method comprises the following steps: reacting diethyl maleate (alpha, beta unsaturated carboxylic acid) with sodium ethoxide to obtain high-purity intermediate compound as shown in a formula II, and preparing prohexadione calcium and trinexapac-ethyl from the compound as shown in the formula II. In the reacting steps for preparing the compound as shown in the formula II, sodium ethoxide serving as a reactant participates in the reaction rather than a strong basic catalyst; a 1,3-cyclohexanedione compound is prepared from the intermediate compound as shown in the formula II and acetone under a reflux condition, and the total yield for the reaction of two steps can be 87 percent. The method has the advantages of low energy consumption, short reaction time, easy operation and the like by using the 1,3-cyclohexanedione compound as the intermediate, and can be used for preparing prohexadione calcium and trinexapac-ethyl with high yield.
SAR studies of 3-cyclopropanecarbonyloxy-2-cyclohexen-1-one as inhibitors of 4-hydroxyphenylpyruvate dioxygenase
Lin, Yung-Lung,Wu, Chung-Shieh,Lin, Shean-Woei,Huang, Jian-Lin,Sun, Yang-Sheng,Yang, Ding-Yah
, p. 685 - 690 (2007/10/03)
Various 3-cyclopropanecarbonyloxy-2-cyclohexen-1-one 1 derivatives have been synthesized and tested as inhibitors of 4-hydroxyphenylpyruvate dioxygenase (4-HPPD) from pig liver. The inhibition results indicated that well-positioned dicarbonyl groups as well as the cyclopropyl group of 1 were essential for potent inhibition. Substitution at the 2-position of the ring system has a significant effect on inhibitor potency, while the 5-position can undergo substantial variations and retain inhibitor potency. In the compounds examined, 2-chloro substituted 12 is the best inhibitor of all with IC50 of 15 nM, the rest of the synthesized analogues were less potent inhibitors than the parent compound.