Category: 113028-17-4

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.113028-17-4,Ethyl 6-fluoro-1-methyl-4-oxo-7-(piperazin-1-yl)-1,4-dihydro-[1,3]thiazeto[3,2-a]quinoline-3-carboxylate,as a common compound, the synthetic route is as follows.

Ethyl-6-fluoro-1 -methyl-4-oxo-7-(1 -piperazinyl)-4H-(1 ,3)-thiazeto-[3,2-a]-quinoline-3- carboxylate (100 gms, 0.265 moles) was stirred in water (600 ml) at 25-30C. To this potassium hydroxide solution (50 gms of potassium hydroxide flakes is dissolved in 200 ml of water) was added and the reaction mass was heated to 80-85C. The contents were stirred for 1 hour and after completion of reaction, the reaction mass was cooled to 25-30C. The pH of the reaction mass was adjusted to 6.5-7.0 using 1:1 aqueous acetic acid solution. The contents were stirred at room temperature for 1 hour. The precipitated solid was filtered, washed with water (2 x 100 ml). The solid was slurried in methanol (300 ml) for 1 hour at 25-30C, filtered, washed with methanol (2 x 50 ml) and dried under vacuum at 70-75C to yield the title compound [90 gms, 97% yield, 96% HPLC purity].

113028-17-4, The synthetic route of 113028-17-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; CIPLA LIMITED; PATHI, Srinivas Laxminarayan; RAO, Dharmaraj Ramachandra; KANKAN, Rajendra; CHINIMILLI, Venugopalarao; CURTIS, Philip Anthony; WO2012/1357; (2012); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

113028-17-4, Ethyl 6-fluoro-1-methyl-4-oxo-7-(piperazin-1-yl)-1,4-dihydro-[1,3]thiazeto[3,2-a]quinoline-3-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

113028-17-4, the reaction vessel 8. 0kg a compound of formula (II), 112kg water, 6. 0kg potassium hydroxide, and heated to 60~ 70 C the hydrolysis reaction, 2 to 3 hours. After completion of the reaction, was cooled to room temperature, 30. 4kg washed with ethyl acetate, the aqueous layer was separated, stirred, adjusted with concentrated hydrochloric acid rhoEta 6~7, stirring was continued for 0.5 hours, the filter cake was suction filtration, an appropriate amount of ethyl washing the filter cake drying, cake was collected, 60~70 C hot air circulation drying, to obtain a compound of formula (III) finished 7. 36kg, yield (mol) 96.4%, purity 97.3%;

The synthetic route of 113028-17-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Jumpcan Pharmaceutical Group/ji chuan(jiang su)Jumpcan Pharmaceutical Group co.ltd; cao, Longxiang; dong, Zibo; niu, ben; shao, Jianguo; (12 pag.)CN103113392; (2016); B;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

113028-17-4, Ethyl 6-fluoro-1-methyl-4-oxo-7-(piperazin-1-yl)-1,4-dihydro-[1,3]thiazeto[3,2-a]quinoline-3-carboxylate is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 8: Preparation of Ulifloxacin;Tertiary butanol (5.55It), 6-fluoro-l-methyl-4-oxo-7-(l-piperazinyl)-4H-[l,3]thiazeto [3,2- a]quinoline-3-carboxylic acid ethyl ester (1.1 lkg), potassium hydroxide (0.37kg) and water (2.75 It) were added at room temperature. The reaction mixture was heated to 600C and maintained for 1.5 hours. Reaction completion was checked by TLC. This was followed by the addition of water (22.2 It) and acetic acid (0.39 It). The reaction mixture was filtered, washed with water followed by slurry wash with acetone (2.22 It) twice and dried to obtain 0.95 kg of ulifloxacin having purity 97.56% by HPLC., 113028-17-4

The synthetic route of 113028-17-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; IND-SWIFT LABORATORIES LIMITED; WO2009/93268; (2009); A1;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.113028-17-4,Ethyl 6-fluoro-1-methyl-4-oxo-7-(piperazin-1-yl)-1,4-dihydro-[1,3]thiazeto[3,2-a]quinoline-3-carboxylate,as a common compound, the synthetic route is as follows.

EXAMPLE 5 Ethyl 7-(4-acetonyl-1-piperazinyl)-6-fluoro-1-methyl-4-oxo-4H-(1,3)thiazeto(3,2-a)quinoline-3-carboxylate Ethyl 6-fluoro-1-methyl-7-(1-piperazinyl)-4-oxo-4H-(1,3)thiazeto(3,2-a)quinoline-3-carboxylate (3.8 g) was suspended in 50 ml of N,N-dimethylformamide, 1.66 g of potassium carbonate was added thereto, 1.65 g of bromoacetone was dropped in with ice cooling and stirring, and the mixture was stirred at room temperature for 20 hours. The reaction solution was poured over into ice water and the crystals separated out were collected by filtration, washed with water, dried and recrystallized from ethanol to give 3.7 g of desired compound in colorless powdery crystals, m.p. 196-200 C. (decompn.). Elementary analysis calculated for C21 H24 FN3 O4 S: Calcd (%): C 58.18, H 5.58, N 9.69. Found (%): C 57.93, H 5.39, N 9.46., 113028-17-4

The synthetic route of 113028-17-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Nippon Shinyaku Co., Ltd.; US4843070; (1989); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.113028-17-4,Ethyl 6-fluoro-1-methyl-4-oxo-7-(piperazin-1-yl)-1,4-dihydro-[1,3]thiazeto[3,2-a]quinoline-3-carboxylate,as a common compound, the synthetic route is as follows.

EXAMPLE 1 Ethyl 6-fluoro-1-methyl-7-[4-(5-methyl-2-oxo-1,3-dioxolen-4yl)methyl-1-piperazinyl]-4oxo-4H-[1,3-]thiazeto[3,2-a]quinoline-3-carboxylate. Ethyl 6-fluoro-1-methyl-4-oxo-7-(1-piperazinyl)-4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylate (3.88 g) and 1.23 g of potassium bicarbonate were suspended in 20 ml of N,N-dimethylformamide, 2.38 g of 4-bromomethyl-5-methyl-1,3-dioxolen-2-one was dropped thereinto with ice cooling, and the mixture was stirred for 3 hours. After the reaction, the solvent was evaporated in vacuo therefrom at 50 C. and the residue was extracted with chloroform containing a few amount of methanol. The extract was washed with water, dried, the solvent was evaporated therefrom and the residue was purified by a column chromatography (chloroform-methanol/silica gel) to give 3.32 g of desired product. M.p. 241-243 C. (decompn.) Elem. Anal. for C23 H24 FN3 O6 S; Calcd. (%) C: 56.43 H: 4.94 N: 8.58; Found (%) C: 56.13 H: 4.99 N: 8.26. IR (KBr) nu (cm-1): 1820, 1720 (carbon-yl). NMR (CF3 CO2 D)(ppm) 1.51(3H, COOCH2 CH3, t), 2.31(3H, STR10 s), 2.35(3H, STR11 d), 3.40~4.30(8H, proton in piperazine ring, m), 4.55(2H, STR12 s), 4.65(2H, COOCH2 CH3, q), 6.51(1H, STR13 q), 7.05(1H, 8-proton, d), 8.11(1H, 5-proton, d).

113028-17-4, The synthetic route of 113028-17-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Nipponshinyaku Co., Ltd.; US5086049; (1992); A;,
Piperazine – Wikipedia
Piperazines – an overview | ScienceDirect Topics