Tag: M.W:100-200

As a common heterocyclic compound, it belong thiazolidine compound,(R)-2-Oxothiazolidine-4-carboxylic acid,19771-63-2,Molecular formula: C4H5NO3S,mainly used in chemical industry, its synthesis route is as follows.,19771-63-2

16(a) (4R)-N-(2-Hydroxyethyl)-2-oxothiazolidine-4-carboxamide 0.9 ml of oxalyl chloride and one drop of N,N-dimethylformamide were added to a suspension of 1.0 g of (4R)-2-oxothiazolidine-4-carboxylic acid in 20 ml of benzene, and the resulting mixture was stirred at room temperature for 1.5 hours. At the end of this time, the solvent was removed by distillation under reduced pressure. A solution of the residual pale yellow oil dissolved in 10 ml of methylene chloride was then added dropwise to a solution of 1.25 g of 2-ethanolamine in 25 ml of methylene chloride, whilst ice-cooling, and the mixture was stirred for 1.5 hours, whilst ice-cooling. The solvent was then removed by distillation under reduced pressure, and the resulting residue was purified by column chromatography through silica gel, using a 9:1 by volume mixture of methylene chloride and methanol as the eluent. The colorless crystals thus obtained were further recrystallized from ethyl acetate, to give 0.65 g of the title compound as colorless plates, melting at 116-118 C. Nuclear Magnetic Resonance Spectrum (CDCl3 +hexadeuterated dimethyl sulfoxide) delta ppm:

With the synthetic route has been constantly updated, we look forward to future research findings about (R)-2-Oxothiazolidine-4-carboxylic acid,belong thiazolidine compound

Reference£º
Patent; Sankyo Company, Limited; US5298516; (1994); A;,
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5908-62-3,With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.5908-62-3,1,1-Dioxo-isothiazolidine,as a common compound, the synthetic route is as follows.

The product of example 67 (460 mg, 8.6 mmol), sulfonamide (210 mg, 1.73 mmol), K2CO3 (240 mg, 1.73 mmol), CuI (30 mg, 0.17 mmol) and DMEDA (30 mg, 0.34 mmol) were mixed in toluene (10 ml) and heated at 90 0C for 3 hours. After being cooled to room temperature, the mixture was filtered, washed with DCM. The filtrate was concentrated into dryness, and the residue was purified by column chromatography using DCM/EA (5/2) as eluent to give the title compound (129 mg, 26.0 % yield).1H NMR (300 MHz, DMSO-/) delta 1.12 (q, J= 6.2 Hz, 6H), 2.34 (dd, J= 10.5, 12.4 Hz, IH), 2.41-2.50 (m, 2H?), 2.78 (dd, J= 10.6, 13.0 Hz, IH), 3.41-3.53 (m, 3H), 3.55-3.67 (m, IH), 3.77 (s, 3H), 3.78 -3.91 (m, 3H), 4.14 (d, J= 12.9 Hz, IH), 4.95 (d, J= 17.2 Hz, IH), 5.02 (s, 2H), 5.19 (d, J= 16.8 Hz, IH), 7.29-7.44 (m, 5H), 7.70 (s, IH).MS (ESI+) m/z 51 A (M+l)

5908-62-3 1,1-Dioxo-isothiazolidine 642157, athiazolidine compound, is more and more widely used in various.

Reference£º
Patent; AVEXA LIMITED; DEADMAN, John, Joseph; JONES, Eric, Dale; LE, Giang, Thanh; RHODES, David, Ian; THIENTHONG, Neeranat; VAN DE GRAFF, Nicholas, Andrew; WINFIELD, Lisa, Jane; WO2010/31; (2010); A1;,
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5908-62-3, 1,1-Dioxo-isothiazolidine is a thiazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,5908-62-3

A stirred mixture of [3-(2-Methyl-l,3-dioxolan-2-yl)tricyclo[3.3.1.03’7]non-l-yl] methyl methanesulfonate as obtained in preparation 2 (1.0 g, 2.9 mmol), K2CO3 (1.16 g, 8.7 mmol) and isothiazolidine- 1,1 -dioxide (0.53 g, 4.35 mmol) in DMF (12.0 mL) was heated to 110C for 16 h. The reaction mixture was cooled to room temperature, diluted with water and extracted with EtOAc. The combined organic layer was washed with brine, dried over Na2SO4 and the solvent was removed under reduced pressure. The crude product was purified by column chromatography to obtain 2-{[3-(2-methyl-l,3-dioxolan-2- yl)tricyclo[3.3.1.03’7]non-l-yl] methyljisothiazolidine 1,1-dioxide as a viscous liquid (0.69 g) in 70% yield, m/z (M+l) 342; 1H NMR (CDCl3) 300 MHz delta 4.04-3.92 (m, 4H), 3.30 (t, J= 6.8 Hz, 2H), 3.10 (t, J= 7.4 Hz, 2H), 2.94 (d, J= 14.6 Hz, IH), 2.87 (d, J= 14.6 Hz, IH), 2.40-2.27 (m, 4H), 1.88-1.72 (m, 2H), 1.72-1.55 (m, 4H), 1.55-1.38 (m, 4H), 1.27 (s, 3H).

5908-62-3 1,1-Dioxo-isothiazolidine 642157, athiazolidine compound, is more and more widely used in various.

Reference£º
Patent; MATRIX LABORATORIES LTD.; WO2007/113634; (2007); A1;,
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.185137-29-5,(S)-4-Phenylthiazolidine-2-thione,as a common compound, the synthetic route is as follows.

General procedure: Under N2 atmosphere, NaH (120 mg, 60% dispersion in mineral oil, 3 mmol)was added to a solution of thiazolidine-2-thione 2 (2.5 mmol) in 5 mL of THF and the resulting solution was cooled to 78C by a dry-ice-acetone bath. Propionyl chloride(255 mg, 2.5 mmol, 480 muL) was then dropped in. After removal of the solvent in vacuo,the residue was purified by column chromatography with a mixture of petroleum ether(60-90C)/EtOAc (5:1, v/v) as eluent., 185137-29-5

The synthetic route of 185137-29-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Chen, Ning; Du, Hongguang; Liu, Weidong; Wang, Shanshan; Li, Xinyao; Xu, Jiaxi; Phosphorus, Sulfur and Silicon and the Related Elements; vol. 190; 1; (2015); p. 112 – 122;,
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2682-49-7, Thiazolidin-2-one is a thiazolidine compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,2682-49-7

EXAMPLE 6 3-(4-Bromobutyl)-2,2-dimethyl-4-thiazolidinone A solution of 2,2-dimethyl-4-thiazolidinone (5.00 g) in DMF (30 ml) was added dropwise to a suspension of NaH (0.0419 mole, previously washed with hexane) in DMF (30 ml) under N2. The resultant mixture was stirred for 1 h, transferred to an addition funnel and added dropwise to a solution of 1,4-dibromobutane (18.10 g) in DMF (50 ml) over a period of 40 min. The resultant solution was heated at 70 C. under N2 for 120 hr. TLC analysis (silica gel, 10% EtOAc/CH2 Cl2) showed the presence of one major product and starting thiazolidinone. The reaction mixture was cooled to room temperature and poured into H2 O (400 ml), and the aqueous mixture extracted with EtOAc (3*175 ml). The combined extracts were washed with H2 O (200 ml) and brine (200 ml), dried over Na2 SO4, and concentrated in vacuo to an oily residue (20.44 g). The crude product was purified by HPLC (4% EtOAc/CH2 Cl2) to yield 5.91 g of oil. Distillation in vacuo afforded 4.61 g of a faint yellowish oil, bp 133-136 C./0.70 mm Hg. ANALYSIS: Calculated for C9 H16 BrNOS: 40.60%C; 6.06%H; 5.26%N. Found: 40.63%C; 6.03%H; 5.17%N.

As the paragraph descriping shows that 2682-49-7 is playing an increasingly important role.

Reference£º
Patent; Hoechst-Roussel Pharmaceuticals Incorporated; US5229388; (1993); A;,
Thiazolidine – Wikipedia
Thiazolidine – ScienceDirect.com

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2682-49-7,Thiazolidin-2-one,as a common compound, the synthetic route is as follows.,2682-49-7

Example 5 Preparation of 3-(2-nitrophenylmethyl)-2-thiazolidinone A mixture containing 3.09 g (0.03 mol) of 2-thiazolidinone, 11.2 g of potassium carbonate, 1.8 g of potassium hydrogen carbonate, 0.5 ml of water, 30 ml of methyl isobutyl ketone and 6.5 g (0.03 mol) of 2-nitrobenzyl bromide is refluxed for 6 hours, then cooled down and thoroughly mixed with 50 ml of water. The mixture is filterred and the clear filtrate is separated. The organic phase is washed with 10 ml of water, dried and evaporated. The oily residue is recrystallized from ethanol to give 2.65 g (37.0%) of the title compound, m.p.: 92-93 C. IR (KBr): 1670 cmmin1 (C=O) 1525, 1345 cmmin1 (NO2) 1H-NMR (CDCl3): 3.1-3.8 ppm (m, 4H, 2CH2) 4.9 ppm (s, 2H,CH2) 7.2-8.3 ppm (m, 4H, ArH).

2682-49-7 Thiazolidin-2-one 97431, athiazolidine compound, is more and more widely used in various.

Reference£º
Patent; RICHTER GEDEON VEGYESZETI GYAR R.T.; EP320910; (1989); A1;,
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As a common heterocyclic compound, it belong thiazolidine compound,3-Aminorhodanine,1438-16-0,Molecular formula: C3H4N2OS2,mainly used in chemical industry, its synthesis route is as follows.,1438-16-0

General procedure: A solution in absolute ethanol (30 mL/mmol) of the adequate aldehyde (1 equiv) and hydrazine (1 equiv) was heated under reflux for 5-18 h depending on the reactants. After cooling to room temperature, the precipitated solid was collected by filtration and dried under vacuum to afford the corresponding hydrazone. If no precipitate was observed, the reaction mixture was concentrated under reduced pressure. 4.2.25 (E)-4-(2-(4-Hydroxy-3-methoxybenzylidene)hydrazinyl)-5-thioxodihydrothiophen-3(2H)-one (4g). 30 Yellow solid, yield: 37%, mp: 161.5-163.5 C. IR (neat) numax: 3524, 3343, 1723, 1712, 1615 cm-1. 1H NMR (300 MHz, DMSO-d6) delta: 3.83 (s, 3H); 4.34 (s, 2H); 6.92 (d, J = 8.2 Hz, 1H); 7.31 (dd, J = 1.9, 8.2 Hz, 1H); 7.46 (d, J = 1.9 Hz, 1H); 8.48 (s, 1H); 10.09 (s, 1H). 13C NMR (75 MHz, DMSO-d6) delta: 34.5; 55.5; 110.3; 115.5; 122.9; 124.8; 148.0; 151.7; 169.7; 170.7; 196.6. HRMS (DCI, CH4) m/z calcd for C11H11N2O3S2 [M+H]+: 283.0211, found: 283.0224.

With the synthetic route has been constantly updated, we look forward to future research findings about 3-Aminorhodanine,belong thiazolidine compound

Reference£º
Article; Vanucci-Bacque, Corinne; Carayon, Chantal; Bernis, Corinne; Camare, Caroline; Negre-Salvayre, Anne; Bedos-Belval, Florence; Baltas, Michel; Bioorganic and Medicinal Chemistry; vol. 22; 15; (2014); p. 4269 – 4276;,
Thiazolidine – Wikipedia
Thiazolidine – ScienceDirect.com