Heterocyclic Building Blocks-Pyrrolines

69778-83-2, 4-Methoxy-1H-pyrrol-2(5H)-one is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

69778-83-2, Preparation of 5-bromo-3-methoxypyrrole-2-carboxaldehyde B To a solution of phosphoryl bromide (220 mol percent, 5.58 g) in dry dichloromethane (20 mL) was added DMF (220 mol percent, 1.4 mL) dropwise over 2 minutes. The resulting reaction mixture was stirred at room temperature for 30 min and concentrated in vacuo to provide the Vilsmeyer complex as a white solid. After drying in vacuo for 1 h, the white solid was suspended in dry dichloromethane (20 mL) and cooled to 0¡ã C. A solution of 4-methoxy-3-pyrrolin-2-one (A) (1 g, 8.84 mmol) in dichloromethane (10 mL) was added dropwise and the resulting reaction mixture was stirred at 0¡ã C. for 30 min, then at room temperature for 20 h. The mixture was poured onto ice (75 mL), treated with aqueous NaOH 4N (50 mL), diluted with EtOAc (100 mL), and stirred for 15 min. The layers were separated, and the aqueous layer was extracted with EtOAc (3*60 mL). The combined organic layers were washed with brine (3*200 mL), dried over Na2SO4, filtered and concentrated in vacuo to afford a crude residue that was purified using flash column chromatography over silica gel with a gradient elution of 0-20percent EtOAC/Hexanes to provide Compound B as a white solid. NMR 1H (300 MHz, CDCl3): delta (ppm) 3.95 (s, 3H); 5.90 (s, 1H); 9.30 (s, 1H), 9.92-10.34 (bs, 1H). m/z: 205.1 [M+1]

As the paragraph descriping shows that 69778-83-2 is playing an increasingly important role.

Reference£º
Patent; Dairi, Kenza; Lavallee, Jean-Francois; Doyle, Terrence W.; US2005/267073; (2005); A1;,
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: Equimolar quantities of maleimide (2) and nitrones (5a-k and 6a-k) were refluxed in toluene (20 ml) and ethyl alcohol (5 ml) for 8-10 h (TLC monitoring using petroleum ether and hexane 1:1) followed by cooling with addition of dry ether. The products (7a-k and 8a-k) were separated out after filtration and recrystallized from toluene and petroleum ether mixture (1:1) to yield cis-isomers (7aa-7ka and 8aa-8ka). The mother liquor on further work up provided trans-isomers which were recrystallized from ethanol and diethyl ether mixture (1:1) (7aa’-7ka’ and 8aa’-8ka’) (Fig. 3).7 These stereoisomers were characterized by their 1H NMR, IR and mass spectra in addition to their melting points and elementary analysis. These stereoisomers have identical IR spectra and elemental analysis but differ in their melting points, 1H NMR and mass spectra.

17057-04-4, The synthetic route of 17057-04-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Anand, Preet; Singh, Baldev; Bioorganic and Medicinal Chemistry; vol. 20; 1; (2012); p. 521 – 530;,
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 the solution of dibromomaleimide 1a orN-methyldibromomaleimide 1b (1 mmol) in THF (20 ml)was added solution of the thiophenol (2.2 mmol) and triethylamine(2.2 mmol) in one portion. The resulting solutionwas stirred at room temperature for 1 h, then evaporated invacuo and the residue was redissolved in ethyl acetate-water(20 + 20 ml) mixture. The organic layer was separated,washed with aq. NaHCO3, dried over anhydrous Na2SO4and evaporated. The residue was purified by flash chromatography(ethyl acetate: petroleum ether 3:1)., 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; Panov, Alexey A.; Lavrenov, Sergey N.; Simonov, Alexander Y.; Mirchink, Elena P.; Isakova, Elena B.; Trenin, Alexey S.; Journal of Antibiotics; vol. 72; 2; (2019); p. 122 – 124;,
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.2973-17-3,1-Allyl-1H-pyrrole-2,5-dione,as a common compound, the synthetic route is as follows.

Synthesis Example f-III-6 Synthesis of Silicone Compound: 1 = n = 0, m =1 in the Chemical Structure 6 Drip 3.08 parts of the compound f-II: N-aryl maleimide, 10 parts of toluene, and 0.043 parts of xylene solution of 2 % by weight platinum / 1,3-divinyl-1,1,3,3-tetramethyl disiloxane complex (manufactured by Sigma-Aldrich Co.) to a solution of 5.0 parts of silicone compound: (1,1,1,3,5,5,5-heptamethyl trisiloxane (manufactured by Sigma-Aldrich Co) and 5.0 parts of toluene in about 60 minutes while stirring at a room temperature followed by reaction under the same condition one night. Thereafter, distill away the solvent with a reduced pressure, conduct stripping treatment for two hours with a reduced pressure of 10 mmHg at 40 C and confirm disappearance of absorption (2155 cm-1 of Si-H in infra-red absorption spectrum to obtain 5.01 parts of the target silicone compound f-M6. The infra-red absorption spectrum graph is shown as Fig. 8F., 2973-17-3

As the paragraph descriping shows that 2973-17-3 is playing an increasingly important role.

Reference£º
Patent; Ricoh Company, Ltd.; EP2520579; (2012); A2;,
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

3,4-dibromo-N-methyl ester maleimide was synthetized from the corresponding 3,4-dibromomaleimide by adapting the procedure disclosed by Castaeda et al. in Tetrahedron Lett. 2013, 54, 3493-3495.3,4-dibromomaleimide (5 g, 19.92 mmol) was dissolved in THE (175 ml). N-methylmorpholine (2.16 ml, 19.92 mmol) and methyl chloroformate (1.51 ml, 19.92 mmol) were added at room temperature under argon. The reaction mixture was stirred at room temperature under argon for 20 mm, then diluted with DCM (200 ml). The organic layer was washed with water (200 ml), dried over MgSO4, concentrated and lyophilized to yield 6.15 g (100%) of product.[00252] 1H NMR (500 MHz, CDCI3): 5= 4.01 (5, 3H). 130 NMR (126 MHz, CDCI3): 5= 159.23, 146.91, 131.41, 54.79., 1122-10-7

As the paragraph descriping shows that 1122-10-7 is playing an increasingly important role.

Reference£º
Patent; HEIDELBERG PHARMA RESEARCH GMBH; GALLO, Francesca; KORSAK, Barbara; MUELLER, Christoph; HECHLER, Thorsten; PAHL, Andreas; KULKE, Michael; SIMON, Werner; LUTZ, Christian; (163 pag.)WO2019/57964; (2019); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

2973-17-3, 1-Allyl-1H-pyrrole-2,5-dione is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Synthesis Example f-III-5 Synthesis of Silicone Compound: 1 = m = n = 0, and X1 = X3 = Substituent A-6 in the Chemical Structure 1 Drip 4.14 parts of the compound f-II: N-aryl maleimide, 10 parts of toluene, and 0.055 parts of xylene solution of 2 % by weight platinum / 1,3-divinyl-1,1,3,3-tetramethyl disiloxane complex (manufactured by Sigma-Aldrich Co.) to a solution of 3.0 parts of silicone compound: (1,1,3,3-tetramethyl trisiloxane (manufactured by Tokyo Chemical Industry Co., Ltd.) and 3.0 parts of toluene in about 60 minutes while stirring at a room temperature followed by reaction under the same condition one night. Thereafter, distill away the solvent with a reduced pressure, conduct stripping treatment for two hours with a reduced pressure of 10 mmHg at 40 C and confirm disappearance of absorption (2155 cm-1 of Si-H in infra-red absorption spectrum to obtain 4.14 parts of the target silicone compound f-M5. The infra-red absorption spectrum graph is shown as Fig. 8E., 2973-17-3

The synthetic route of 2973-17-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Ricoh Company, Ltd.; EP2520579; (2012); A2;,
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

NHS ester, compound 5a (8.2 mg, 7.6 muiotaetaomicron) and l-(2-aminoethyl)-lH-pyrrole-2,5-dione hydrochloride (2.2 mg, 0.011 mmol) were dissolved in anhydrous dichloromethane (305 mu) at room temperature. DIPEA (2.66 mu, 0.015mmol) was added and the reaction and was stirred for 3.5 hours. The reaction mixture was concentrated and was purified by RPHPLC (CI 8 column, CH3CN/H2O, gradient, 35% to 55%). The desired product fractions were frozen and lyophilized to give maleimide, compound D5 as a solid white powder (5.3 mg, 58% yield). LCMS = 5.11 min (8 min method). MS (m/z): 1100.6 (M + 1)+.

134272-64-3, As the paragraph descriping shows that 134272-64-3 is playing an increasingly important role.

Reference£º
Patent; IMMUNOGEN, INC.; KOVTUN, Yelena; TAVARES, Daniel; RUI, Lingyun; CHITTENDEN, Thomas; (386 pag.)WO2017/4026; (2017); A1;,
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

To 2.5 g of 3,4-dibromo-1H-pyffole-2,5-dione (10 mmol) and 1 g of NMM in 60 mL of THF, MeOCOC1 (10 mmol, 940 mg in 10 ml DCM) was added dropwise, stuffed for 20 mm, then the reaction solution was diluted with 6o mL of DCM, washed 3 time by water, the organic phase was stirred by sodium sulfate anhydrous, concentrated, 2.65g of methyl 3,4-dibromo-2,5-dioxo-2H-pyrrole-1(5H)-carboxylate was obtained. To 311mg, 1 mmol of this compound, 2-(2-azidoethoxy)ethanamine (130 mg, 1 mmol) and 5 mL DCM was added, TLC shown the reaction finished in 20 mm, then extracted by DCM and brine, washed by NH4C1 solution, dried on sodium sulfate anhydrous, and then concentrated for column purification, flashed by 2:1 hexane and ethyl ethylate, 230 mg of 1-(2-(2-azidoethoxy)ethyl)-3,4-dibromo-1H-pyffole-2,5-dione obtained. 1HNMR: 3.32 ppm (t, J = 5.0 Hz, 1H), 3.40 ppm (t, J = 5.0Hz, 1H), 3.50 ppm (q, J =5.0 Hz, 1H), 3.62 ppm (t, J = 5.0 Hz, 1H), 3.63-3.69 ppm (m, 3H),3.84 ppm (t, J = 5 hz, 1H). Fw: 365.9, C8H8Br2N4O3 Mass Peaks (1:2:1): 366.9, 368.9,370.9.

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

Reference£º
Patent; SORRENTO THERAPEUTICS, INC.; FU, Yanwen; KAUFMANN, Gunnar, F.; JONES, Bryan; TOUGHIRI, Raheleh; (82 pag.)WO2015/175357; (2015); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem

25021-08-3, 2-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetic acid is a pyrrolines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Trifluoroacetic Acid/N-(2-aminoethyl)-2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetamide (1:1) The title compound was prepared by classical methods of peptide chemistry from commercially available (2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetic acid and tert-butyl (2-aminoethyl)carbamate.

25021-08-3, As the paragraph descriping shows that 25021-08-3 is playing an increasingly important role.

Reference£º
Patent; Bayer Pharma Aktiengesellschaft; LERCHEN, Hans-Georg; REBSTOCK, Anne-Sophie; CANCHO GRANDE, Yolanda; MARX, Leo; STELTE-LUDWIG, Beatrix; TERJUNG, Carsten; MAHLERT, Christoph; GREVEN, Simone; SOMMER, Anette; BERNDT, Sandra; (684 pag.)US2018/169256; (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.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.

[4611] 10 mg (9.3 f.tmol) of N-(3-carboxypropyl)-N-methyl-L-valyl-N -[ (3R,4S,5S)-3-methoxy-l-{ (2S)-2-[ (lR,2R)-1-methoxy-2-methyl-3-oxo-3-{ [ (2R)-1-phenyl-4-( 4-sulphophenyl)butan-2-yl]amino }propyl]pyrrolidin-1-yl }-5-methyl-1-oxoheptan-4-yl]-N-methyl-L-valinamide, 3.5 mg(10.3 flillOI) of 6-(2,5-dioxo-2,5-dihydro-lH-pyrrol-1-yl)hexanehydrazide trifluoroacetate, 4.3 mg (11.2 f.tmol) ofHATU and 4.9 fll (28 f.tmol) ofHlinig’s base were stirred in 1ml ofDMF at RT for 20 h. Subsequently, the reaction mixturewas purified by means of preparative HPLC. 4.2 mg (92%purity, 33% of theory) of the title compound were obtained.[4612] LC-MS (Method 1): R,=0.91 min; MS (ESipos):m/z=1166 (M+Ht

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; SEATTLE GENETICS, INC.; LERCHEN, Hans-Georg; LINDEN, Lars; SHEIKH, Sherif El; WILLUDA, Joerg; KOPITZ, Charlotte C.; SCHUHMACHER, Joachim; GREVEN, Simone; MAHLERT, Christoph; STELTE-LUDWIG, Beatrix; GOLFIER, Sven; BEIER, Rudolf; HEISLER, Iring; HARRENGA, Axel; THIERAUCH, Karl-Heinz; BRUDER, Sandra; PETRUL, Heike; JOeRISSEN, Hannah; BORKOWSKI, Sandra; US2015/246136; (2015); A1;,
Pyrroline – Wikipedia
1-Pyrroline | C4H7N – PubChem