Month: August 2020

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1334177-86-4,1-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)-3-oxo-7,10,13,16,19,22,25,28-octaoxa-4-azahentriacontan-31-oic acid,as a common compound, the synthetic route is as follows.

(d) 1-(3-(2, 5-dioxo-2 , 5-dihydro- 1H-pyrrol- 1-yl)propanamido)-N-((S)- 1-(((S)- 1-((4-((S)-7- methoxy-8-((5-(((S)- 7-methoxy-2-(4-(4-methylpiperazin- 1-yl)phenyl)-5-oxo-5, 1 la-dihydro- 1H- benzo[e]pyrrolo[1, 2-a][1, 4]diazepin-8-yl) oxy)pentyl) oxy)-5-oxo-5, 1 la-dihydro- 1H- benzo[e]pyrrolo[1, 2-a][1, 4]diazepin-2-yl)phenyl)amino) – 1-oxopropan-2-yl)amino)-3-methyl- 1- oxobutan-2-yl)-3, 6,9, 12,15, 18,21, 24-octaoxaheptacosan-2 7-amide (91)Piperidine (0.2 mL) was added to a solution of 90 (77 mg, 63.4 pmol) in DMF (1 mL). The reaction mixture was allowed to stir for 20 minutes. The reaction mixture was carefully diluted with DCM (50 mL) and washed with water (50 mL). The organic layers was washed with brine (100 mL), dried over Mg504, filtered and evaporated under reduced pressure to provide the unprotected valine intermediate. The crude residue was immediately redissolved in chloroform (5 mL). Mal(Peg)8-acid (56 mg, 95 pmol) and EDCI (18 mg, 95 pmol) were added, followed by methanol (0.1 mL). The reaction was allowed to stir for 3 hours at room temperature at which point completion was observed by TLC and LC/MS (1.19 mm (ES+) m/z(relative intensity) 784.25 (([M+ 2H]2j/2, 100)). The reaction mixture was diluted with chloroform (50 mL), washed with water (100 mL), dried (MgSO4), filtered and evaporated in vacuo, followed by high vacuum drying, to provide the crude product. Purification by flash chromatography (gradient elution: HPLC grade 96:4 v/v CHCI3/MeOH to 90:10 v/v CHCI3/MeOH) gave 91 as a yellow solid (43 mg, 43%). 1H NMR (400 MHz, ODd3) O 8.73 (5, 1H), 7.88 (dd, J= 7.6, 3.9 Hz, 2H), 7.75 (d, J= 8.6 Hz, 2H), 7.52 (d, J= 2.0 Hz, 2H), 7.44 (5, 1H), 7.40-7.28 (m, 4H), 6.91 (d, J= 8.8 Hz, 2H), 6.81 (5, 2H), 6.69 (5, 2H),6.48 (5, 1 H), 4.72 -4.63 (m, 1 H), 4.46 -4.34 (m, 2H), 4.25 – 4.03 (m, 6H), 3.95 (5, 4H), 3.84 (dd, J = 17.2, 10.1 Hz, 4H), 3.72 -3.46 (m, 30H), 3.44 -3.32 (m, 4H), 3.30-3.20 (m, 4H), 2.75-2.63 (m, 1H), 2.59 (5, 4H), 2.55-2.43 (m, 3H), 2.37 (5, 3H), 2.29 (dd, J= 12.7, 6.7 Hz, 1H), 2.03-1.89 (m, 4H), 1.72 (d, J= 22.7 Hz, 8H), 1.46 (d, J= 7.2 Hz, 3H), 1.01 (dd, J = 11.5, 6.9 Hz, 6H). MS (ES) m/z (relative intensity) 784.25 (([M+ 2H]2)/2, 100).

1334177-86-4, As the paragraph descriping shows that 1334177-86-4 is playing an increasingly important role.

Reference£º
Patent; CANCER RESEARCH TECHNOLOGY LIMITED; VAN BERKEL, Patricius Henrikus Cornelis; HOWARD, Philip Wilson; WILLIAMS, David G; WO2015/159076; (2015); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.151038-94-7,6-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)hexanehydrazide 2,2,2-trifluoroacetate,as a common compound, the synthetic route is as follows.

EMCH-TFA (3 equiv) and 0.75 equiv TFA were added to an anhydrous ethanol (dried by 3 A molecular sieves, superactivated by heating to 150 C under a vacuum of 0.1 Torr) solution (8.57 mL) of PPD (15 mg, 18.3 muiotaetaomicron, 1 equiv) and stirred under a nitrogen atmosphere overnight at room temperature. The extent of the reaction was monitored by HPLC (Method 1.3). Once 90% complete by HPLC, the solution was evaporated to dryness and the residue redissolved in anhydrous DMSO. PPD/PPD-EMCH was precipitated by adding at least 3 volumes of PBS (pH 7.4). The precipitate was washed with dH20 (pH > 6.5) and redissolved in DMSO. The precipitation was repeated three times, followed by further purification by radial chromatography, eluting PPD and PPD-EMCH with 90: 1 and 20: 1 chloroform:methanol, repectively. NMR spectra were obtained at 56C in deuteriochloroform (Figure 5)., 151038-94-7

The synthetic route of 151038-94-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE; KOCH, Tad, H.; BARTHEL, Benjamin, L.; ROWAN, Alexander, R.H.; WO2012/167255; (2012); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

134272-64-3, N-(2-Aminoethyl)maleimide Hydrochloride is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a suspension of the free thiol, Dl (88 mg, 0.105 mmol) and l-((2,5- dioxopyrrolidin-l-yl)oxy)-l-oxo-4-(pyridin-2-yldisulfanyl)butane-2-sulfonic acid (sulfo- SPDB) (64.0 mg, 0.158 mmol) in anhydrous dichloromethane (2.10 mL) was added DIPEA (55.0 mu, 0.315 mmol) under nitrogen at room temperature. The mixture stirred for 16 hours and then l-(2-aminoethyl)-lH-pyrrole-2,5-dione hydrochloride (55.6 mg, 0.315 mmol), anhydrous dichloromethane (1.0 mL) and DIPEA (0.055 mL, 0.315 mmol) were added. The mixture stirred for an additional 5 hours at room temperature upon which the reaction was concentrated in vacuo. The resulting residue was purified by RP-HPLC (CI 8, CH3CN/H2O). Fractions containing desired product were frozen and lyophilized to give maleimide, D4 (20 mg, 16% yield) as a white solid. LCMS = 4.92 min (8 min method). MS (m/z): 1158.6 (M + 1)+.

134272-64-3, The synthetic route of 134272-64-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; IMMUNOGEN, INC.; MACROGENICS, INC.; HICKS, Stuart William; YODER, Nicholas C.; BARAT, Bhaswati; BONVINI, Ezio; DIEDRICH, Gundo; JOHNSON, Leslie S.; LOO, Deryk; SCRIBNER, Juniper A.; (260 pag.)WO2018/119196; (2018); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.25021-08-3,2-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetic acid,as a common compound, the synthetic route is as follows.

Trifluoroacetic acid/L-alanyl-N5-carbamoyl-N-(4-{[(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetyl]amino}phenyl)-L-ornithinamide (1:1) The title compound was prepared from 1,4-phenylenediamine sequentially according to classical methods of peptide chemistry. In the first step, 942 mg (8.72 mmol) of 1,4-phenylenediamine were monoacylated with 0.8 g (2.9 mmol) of N2-(tert-butoxycarbonyl)-N5-carbamoyl-L-ornithine in the presence of HATU and N,N-diisopropylethylamine. In the second step, in an analogous manner, the second anilinic amino group was acylated with (2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetic acid in the presence of HATU and N,N-diisopropylethylamine. Deprotection with TFA, coupling with 2,5-dioxopyrrolidin-1-yl N-(tert-butoxycarbonyl)-L-alaninate and another deprotection with TFA then gave, in 3 further synthesis steps, the title compound, 148 mg of which were obtained by this route. LC-MS (Method 1): Rt=0.21 min; MS (ESIpos): m/z=474 (M+H)+. LC-MS (Method 4): Rt=0.2 min; MS (ESIpos): m/z=474 (M+H)+.

25021-08-3, The synthetic route of 25021-08-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; BAYER PHARMA AKTIENGESELLSCHAFT; LERCHEN, Hans-Georg; REBSTOCK, Anne-Sophie; CANCHO GRANDE, Yolanda; WITTROCK, Sven; BERNDT, Sandra; GRITZAN, Uwe; FITTING, Jenny; STELTE-LUDWIG, Beatrix; JONES, Patrick; MAHLERT, Christoph; VOTSMEIER, Christian; SCHOeNFELD, Dorian; TRAUTWEIN, Mark; WEBER, Ernst; PAWLOWSKI, Nikolaus; GREVEN, Simone; GLUeCK, Julian Marius; HAMMER, Stefanie; DIETZ, Lisa; MAeRSCH, Stephan; (357 pag.)US2020/138970; (2020); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1122-10-7,3,4-Dibromo-1H-pyrrole-2,5-dione,as a common compound, the synthetic route is as follows.

General procedure: Dried pressure tube was charged with magnetic stir bar and50 mg of PdSiO2 catalysts (1 mol% with respect to amine). Then,1.0 mL o-xylene was added, followed by the addition of 0.5 mmolof amine and 1 mmol of benzyl alcohol. The pressure tube wasflushed with argon was closed with screw cap. Then it was placedin the preheated aluminum block and reaction was allowed to progressfor 30 h at 150 C. After completion of the reaction, pressuretube was removed from aluminum block and cooled down to roomtemperature. The catalyst was filtered out by ciliate and reactionproducts were analyzed by GC-MS and the corresponding amineswere purified by column chromatography. The yields of selectedamines were determined by GC analysis using n-hexadecane asstandard. For this purpose, after completion of the reaction, nhexadecane(100 mL) as standard was added to the reaction pressuretube and the reaction products were diluted with ethyl acetate followed by filtration using plug of silica and then subjected GCanalysis., 1122-10-7

1122-10-7 3,4-Dibromo-1H-pyrrole-2,5-dione 14279, apyrrolines compound, is more and more widely used in various.

Reference£º
Article; Alshammari, Ahmad S.; Natte, Kishore; Kalevaru, Narayana V.; Bagabas, Abdulaziz; Jagadeesh, Rajenahally V.; Journal of Catalysis; vol. 382; (2020); p. 141 – 149;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

541-59-3, Maleimide is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,541-59-3

The title compound was prepared using a modification of the method of Foley, et al., 2010 Biomol. Chem. 8:4601-4606). To a solution of maleimide (5.0 g, 51.5 mmole) in dry ethyl acetate (250 mL) was added N-methylmorpholine (5.7 mL, 51.5 mmole) and this mixture cooled to 0 C. (ice-bath) under anhydrous N2(g). Methyl chloroformate (4.8 mL, 61.8 mmole) was added slowly with stirring under anhydrous conditions, and the reaction allowed to stir at 0 C. for 30 min. and at room temperature for 30 min. The reaction mixture was filtered through a Buchner funnel and the white precipitate washed with ethyl acetate (100 mL). The combined filtrate was extracted with ice-water (1*100 mL) and brine solution (1*100 mL) and then dried over anhydrous magnesium sulfate. The product was filtered and evaporated to a clear oil that was co-evaporated with dry toluene (2*25 mL) and dried in vacuo under high vacuum overnight. The resulting clear oil was crystallized by trituration from anhydrous diethylether (50 mL) to give an off-white solid (2.77 g, 35%) homogeneous by t.l.c. (irrigant=9:1 dichloromethane:methanol, Rf=0.62).

541-59-3 Maleimide 10935, apyrrolines compound, is more and more widely used in various.

Reference£º
Patent; Marker Gene Technologies, Inc.; Naleway, John Joseph; Harlan, Fiona Karen; Lusk, Jason Scott; (72 pag.)US2018/207287; (2018); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1122-10-7,3,4-Dibromo-1H-pyrrole-2,5-dione,as a common compound, the synthetic route is as follows.

General procedure: To a stirred solution of 2,3-dibromomaleimide23 (1.0 mmol) in CH2Cl2 (20ml) Et3N (2.0mmol) and thiol (2.1mmol) were added under argon atmosphere and stirred for 3 h at room temperature. The reaction mixture was evaporated,and the crude product was purified by flash chromatography to give the desired compound.

1122-10-7, 1122-10-7 3,4-Dibromo-1H-pyrrole-2,5-dione 14279, apyrrolines compound, is more and more widely used in various.

Reference£º
Article; Csavas, Magdolna; Miskovics, Adrienn; Szcs, Zsolt; Rth, Erzsebet; Nagy, Zsolt L; Bereczki, Ilona; Herczeg, Mihaly; Batta, Gyula; Nemes-Nikodem, Eva; Ostorhazi, Eszter; Rozgonyi, Ferenc; Borbas, Aniko; Herczegh, Pal; Journal of Antibiotics; vol. 68; 9; (2015); p. 579 – 585;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

17057-04-4, 4-(2,5-Dioxo-2,5-dihydro-pyrrol-1-yl)-benzoicacid is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A mixture of 8.68 g (0.04 mol) of acid 1a, 9.52 g (0.08 mol) of thionyl chloride, 5 drops ofDMF, and 150 mL of benzene was heated for 2 h underreflux. The slightly turbid solution was filtered whilehot through a folded filter paper, and the light yellow filtrate was evaporated under reduced pressure (waterjetpump) on heating on a water bath. Yield 8.03 g(85%), 17057-04-4

17057-04-4 4-(2,5-Dioxo-2,5-dihydro-pyrrol-1-yl)-benzoicacid 86925, apyrrolines compound, is more and more widely used in various.

Reference£º
Article; Kolyamshin; Kuz’min; Ignat’ev; Rogozhina; Kol’tsov; Russian Journal of Organic Chemistry; vol. 51; 6; (2015); p. 901 – 902; Zh. Org. Khim.; vol. 51; 6; (2015); p. 917 – 918,2;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

1122-10-7, 3,4-Dibromo-1H-pyrrole-2,5-dione is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: To a stirred solution of 2,3-dibromomaleimide23 (1.0 mmol) in CH2Cl2 (20ml) Et3N (2.0mmol) and thiol (2.1mmol) were added under argon atmosphere and stirred for 3 h at room temperature. The reaction mixture was evaporated,and the crude product was purified by flash chromatography to give the desired compound., 1122-10-7

The synthetic route of 1122-10-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Csavas, Magdolna; Miskovics, Adrienn; Szcs, Zsolt; Rth, Erzsebet; Nagy, Zsolt L; Bereczki, Ilona; Herczeg, Mihaly; Batta, Gyula; Nemes-Nikodem, Eva; Ostorhazi, Eszter; Rozgonyi, Ferenc; Borbas, Aniko; Herczegh, Pal; Journal of Antibiotics; vol. 68; 9; (2015); p. 579 – 585;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.1122-10-7,3,4-Dibromo-1H-pyrrole-2,5-dione,as a common compound, the synthetic route is as follows.

General procedure: To a solution of N-R-maleimide (10 mmol) in CCl4 (15 mL) was added dropwise a solution of Br2 (0.57 mL, 11 mmol) in CCl4 (10mL) at rt After the addition is completed, the reaction mixture was refluxed for 1 h and then cooled to room temperature. The solvent was evaporated in vacuo to give the crude trans-2,3-Dibromo-N-R-succinimide as pale-yellow solid. The crude succinimide was dissolved in THF (30 mL) and triethylamine (1.40 mL, 11 mmol) in THF (5 mL) was added dropwise at 0 oC.The resulting mixture was allowed to warm to room temperature and stirred for two h before concentrated in vacuo. The residue was dissolved in EtOAc and washed with H2O and brine. The organic layer was dried with anhydrous Na2SO4 and evaporated in vacuo to give bromo-N-R-maleimide (1)as pale-yellow solid with good yields., 1122-10-7

The synthetic route of 1122-10-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Li, Xiangmin; Li, Hongxian; Yang, Wei; Zhuang, Jinchen; Li, Hao; Wang, Wei; Tetrahedron Letters; vol. 57; 24; (2016); p. 2660 – 2663;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem