44981-94-4Relevant articles and documents
Preparation method of zabofloxacin intermediate
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Paragraph 0045-0068, (2018/10/27)
The invention provides a preparation method of a zabofloxacin intermediate. The method comprises: reacting ethyl glycinate hydrochloride with acrylonitrile under catalysis of a base to form an intermediate I; then reacting the intermediate I with Boc anhydride under the function of a strong base to generate an intermediate III; reacting the intermediate III, the methoxyamine hydrochloride and formaldehyde to generate an intermediate IV; and then preparing the zabofloxacin intermediate by reacting the intermediate IV with methanesulfonyl chloride, performing reduction with sodium borohydride, and other steps. The zabofloxacin intermediate is prepared through nine steps with a high yield and high quality by the method, the material adding amount reaches the level of hundreds of grams, and the method is suitable for industrial production.
A preparation method of the lucky mischa star side chain
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Paragraph 0027; 0038, (2018/01/20)
The invention relates to a preparation method of a gemifloxacin side chain. The preparation method comprises that N-tertbutyloxycarbonyl-4-cyano-3-pyrrolidone is prepared or taken and then reacts with trimethyl orthoformate to produce N-tertbutyloxycarbonyl-4-cyano-3-dimethoxypyrrolidone, the N-tertbutyloxycarbonyl-4-cyano-3-dimethoxypyrrolidone, methanol, a catalyst and (BOC)2 anhydride undergo a complete reaction at a room temperature to produce N-tertbutyloxycarbonyl-4-aminomethyl-3-dimethoxypyrrolidone, the N-tertbutyloxycarbonyl-4-aminomethyl-3-dimethoxypyrrolidone and HAC undergo a complete reaction at a room temperature with stirring to produce N-tertbutyloxycarbonyl-4-aminomethyl-3-pyrrolidone, and the N-tertbutyloxycarbonyl-4-aminomethyl-3-pyrrolidone is transformed into the gemifloxacin side chain 4-aminomethyl-3-methoxyiminopyrrolidone. The preparation method has simple processes, allows mild reaction conditions easily to be realized, has a low raw material price, a low cost and less environmental pollution and creates a novel gemifloxacin side chain pyrrolidone ketonic group protection method and a gemifloxacin side chain synthesis route.
(R)- N - [5 - (2 - methoxy - 2 - phenyl-acetyl) - 1, 4, 5, 6 - tetrahydro-pyrrolo [3, 4 - c] pyrazole - 3 - yl] - 4 - (4 - methyl piperazine - 1 - yl) benzamide synthesis method
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Paragraph 0055; 0084; 0106; 0147, (2017/02/17)
The invention belongs to the technical field of medicine and relates to a preparation method for PHA739358(Danusertib), i.e., (R)-N-[5-(2-methoxy-2-phenylacetyl)-1,4,5,6-tetrahydropyrrolo[3,4-c]pyrazole-3-yl]-4-(4-methyl piperazine-1-yl)benzamide. According to the invention, altogether four reaction routes are designed, simple and easily available glycine is used as a raw material, reactions like addition, esterification, amino protection and cyclization are carried out so as to prepare (R)-N-[5-(2-methoxy-2-phenylacetyl)-1,4,5,6-tetrahydropyrrolo[3,4-c]pyrazole-3-yl]-4-(4-methyl piperazine-1-yl)benzamide, yield of the route 1, 2 and 4 is more than 25%, respectively, and yield of the route 3 is more than 20%. The preparation method has the advantages of a few reaction steps, simple and convenient post-treatment operation, little time consumption, high yield and low total cost. Thus, a novel method is provided for preparation of the antitumor drug PHA739358.
MACROCYCLIC INHIBITORS OF JAK
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Page/Page column 16; 17, (2011/04/18)
The present invention relates to the use of novel macrocyclic compounds of Formula I, wherein the variables Q, Q1, Q2, Q3, and Q4 are defined as described herein, which inhibit JAK and are useful for the treatment of auto-immune and inflammatory diseases.
AMINOPYRIMIDINES AS SYK INHIBITORS
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Page/Page column 31, (2011/07/07)
The present invention provides novel pyrimidine amines of formula (I) which are potent inhibitors of spleen tyrosine kinase, and are useful in the treatment and prevention of diseases mediated by said enzyme, such as asthma, COPD and rheumatoid arthritis.
Synthesis and in-vitro antibacterial activity of 7-(3-aminopyrrolo[3,4-c] pyrazol-5(2H,4H,6H)-yl)-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid derivatives
Guo, Xin,Bai, Xiao-Guang,Li, Yi-Liang,An, Zhi-Jiao,Xu, Le-Xing,Han, Li-You,Liu, Ming-Liang,Guo, Hui-Yuan,Wang, Yu-Cheng
experimental part, p. 523 - 529 (2011/10/30)
A series of novel 7-(3-aminopyrrolo[3,4-c]pyrazol-5(2H,4H,6H)-yl)-6-fluoro- 4-oxo-1,4-dihydroquinoline-3-carboxylic acid derivatives was designed, synthesized and characterized by 1H-NMR, MS and HRMS. These fluoroquinolones were evaluated for their in-vitro antibacterial activity against representative Gram-positive and Gram-negative strains. Generally, all of the target compounds display rather weak potency against the tested Gram-negative strains, but most of them exhibit good potency in inhibiting the growth of S. aureus including methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus epidermidis including methicillin-resistant S. epidermidis (MRSE) (MIC: 0.125-8 μg/mL). In particular, the compound 9g is 2 to 32 fold more potent than gemifloxacin (GM), moxifloxacin (MX), gatifloxacin (GT), and levofloxacin (LV) against S. pneumoniae 08-3, K. pneumoniae 09-23, and P. aeruginosa ATCC27853, 4 to 32 fold more potent than MX, GM, and LV against K. pneumoniae 09-21, and more active than or comparable to the four reference drugs against P. aeruginosa 09-32. A series of novel fluoroquinolone derivatives was designed and synthesized. All target compounds display rather weak potency against the tested Gram-negative strains, but most of them exhibit good potency in inhibiting the growth of Staphylococcus aureus and Staphylococcus epidermidis. In particular, the compound 9g is the most promising drug.
Synthesis and in vitro antibacterial activity of fluoroquinolone derivatives containing 3-(N′-alkoxycarbamimidoyl)-4-(alkoxyimino) pyrrolidines
Guo, Qiang,Feng, Lian-Shun,Liu, Ming-Liang,Zhang, Yi-Bin,Chai, Yun,Lv, Kai,Guo, Hui-Yuan,Han, Li-You
experimental part, p. 5498 - 5506 (2010/12/25)
A series of novel 7-[3-(N′-alkoxycarbamimidoyl)-4-(alkoxyimino) pyrrolidin-1-yl] fluoroquinolone derivatives were designed, synthesized and characterized by 1H NMR, MS and HRMS. These fluoroquinolones were screened for their in vitro antibacter
Synthesis and biological activity of novel 1β-Methylcarbapenems with oxyiminopyrrolidinylamide moiety
Lee, Ji Hoon,Lee, Kyung Seok,Kang, Yong Koo,Yoo, Kyung Ho,Shin, Kye Jung,Kim, Dong Chan,Kong, Jae Yang,Lee, Yeonhee,Lee, Sook Ja,Kim, Dong Jin
, p. 4399 - 4403 (2007/10/03)
The synthesis and antibacterial activity of novel 1β- methylcarbapenems 1a-f bearing oxyiminopyrrolidinylamide moiety at C-5 position of pyrrolidine are described. Most compounds exhibited comparable antibacterial activity to meropenem against a wide range of Gram-positive and Gram-negative organisms including Pseudomonas aeruginosa isolates. Of these carbapenems, 1a showed potent and broad spectrum of antibacterial activity and similar stability to DHP-I to meropenem. Against clinical isolates of 40 Gram-negative bacterial species including MDR and ESBL-producing strains, the selected carbapenem 1a possessed excellent in vitro activity except for MDR P. aeruginosa, and was comparable in potency to meropenem.
Discovery of gemifloxacin (Factive, LB20304a): A quinolone of new a generation
Hong, Chang Yong
, p. 41 - 44 (2007/10/03)
Novel quinolone antibacterials, which bear an alkyloxime substituent in the 4-position and an aminomethyl substituent in the 3-position of the pyrrolidine ring, have been designed and synthesized. These fluoroquinolones were found to possess extremely potent antimicrobial activity against Gram-positive organisms including resistant strains such as methicillin-resistant Staphylococcus aureus (MRSA). Among these compounds our development candidate, Gemifloxacin (Factive, LB20304a), showed the best in vivo efficacy and pharmacokinetic profile in animals, as well as good safety pharmacological properties. Gemifloxacin was found to be especially effective against respiratory tract infections that account for over 70% of all infections. With once-a-day dosage, potency against respiratory tract infections such as chronic bronchitis and pneumonia was ensured without any significant side effect. In December 1999, Gemifloxacin filed a NDA for marketing approval to the US Food and Drug Administration. Copyright
Process for producing an N-alkoxycarbonyl-N-cyanoethyl amino acid alkyl ester
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, (2008/06/13)
An N-alkoxycarbonyl-N-cyanoethyl amino acid alkyl ester is produced at a high yield by reacting a mineral acid salt of amino acid alkyl ester with acrylonitrile in an alcohol medium in the presence of an inorganic base to form an N-cyanoethyl amino acid alkyl ester and then reacting the N-cyanoethyl amino acid alkyl ester with a dialkyl dicarbonate.