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Structure of 1237535-77-1

Chemical Structure| 1237535-77-1

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Product Details of [ 1237535-77-1 ]

CAS No. :1237535-77-1
Formula : C10H12FIN2O2
M.W : 338.12
SMILES Code : O=C(OC(C)(C)C)NC1=NC=CC(F)=C1I
MDL No. :MFCD21362362

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Application In Synthesis of [ 1237535-77-1 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 1237535-77-1 ]

[ 1237535-77-1 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 3054-95-3 ]
  • [ 1237535-77-1 ]
  • [ 1237535-78-2 ]
YieldReaction ConditionsOperation in experiment
47% With N-ethyl-N,N-diisopropylamine;di-mu-chlorobis[5-hydroxy-2-[1-(hydroxyimino)ethyl]phenyl]palladium(II) dimer; In water; N,N-dimethyl-formamide; at 140℃; for 5h; Step 3 Preparation of 5-fluoro-3,4-dihydro-1,8-naphthyridin-2(1H)-one A round bottom flask was charged with tert-butyl (4-fluoro-3-iodopyridin-2-yl)carbamate (20.0 g, 59.2 mmol), 3,3-diethoxy-1-propene (13.5 mL, 88.7 mmol), DMF (150 mL), water (50 mL), DIPEA (15.4 mL, 88.7 mmol) and Pd catalyst 1 (Corma, A.; Garcia, H.; Leyva, A. Tetrahedron 61, 9848, 2005) (480 mg, 0.827 mmol) and the reaction mixture was stirred in an oil bath at 140 C. After 5 h, the reaction mixture was cooled in a refrigerator for 2 days. The precipitate was isolated by filtration, washed with diethyl ether, and dried to give 3.25 g of pink needles. The filtrate was concentrated to give a reddish semi-solid. This material was redissolved in DCM, and the solution was passed through 200 g of SiO2. Concentration of the resulting solution provided a red/orange residue which was recrystallized from 2-propanol (150 mL) to give 9.4 g of a pink solid. Purification of this pink solid by column chromatography (SiO2, elution with 0-75% EtOAc/DCM) provided 1.41 g of a white powder. Overall, 4.66 g of final productproduct was isolated (47% yield). LC/MS: (FA) ES+ 167. 1H NMR (300 MHz, d6 DMSO): delta 10.67 (s, 1H), 8.13-8.08 (m, 1H), 6.93-6.88 (m, 1H), 2.87 (t, 2H), and 2.51 (t, 2H). This reaction may also be carried out under the same conditions using Pd(OAc)2 as catalyst, both in the presence or absence of tri-o-tolylphosphine as ligand. In a method analogous to that described for 5-fluoro-3,4-dihydro-1,8-naphthyridin-2(1H)-one, 5-chloro-3,4-dihydro-1,8-naphthyridin-2(1H)-one was prepared from 2,4-dichloropyridine. LC/MS: (AA) ES+ 183. 1H NMR (400 MHz, d6 DMSO): delta 10.68 (s, 1H), 8.07-8.06 (m, 1H), 7.13-7.11 (m, 1H), 2.96 (t, 2H), and 2.55 (t, 2H).
47% With N-ethyl-N,N-diisopropylamine;Pd catalyst; In N,N-dimethyl-formamide; at 140℃; for 5h; Step 3: 5-fluoro-3,4-dihydro-l,8-naphthyridin-2(lH)-one Intermediate-28 [00201] A round bottom flask was charged with f erf-butyl (4-fluoro-3-iodopyridin-2-yl)carbamate (Int-27, 20 g, 59.2 mmol), 3,3-diethoxy-l-propene (13.5 mL, 88.7 mmol), NN-dimethylformamide (150 mL), water (50 mL), NN-diisopropylethylamine (15.4 mL, 88.7 mmol) and the Pd catalyst ("Palladacyle 1" from Corma et. al. Tetrahedron 2005, 61(41):9848; 480 mg, 0.827 mmol) and the reaction mixture was warmed to 140 C. After 5 h, the reaction mixture was cooled in a refrigerator for 2 days. The resulting precipitate was isolated by suction filtration, washed with diethyl ether, and dried to give 3.25 g of pink needles. The filtrate was concentrated to give a reddish semi-solid. This material was redissolved in methylene chloride and the solution was passed through 200 g of silica. Concentration of the resulting solution provided a red/orange residue which was recrystallized from 2-propanol (150 mL) to give 9.4 g of a pink solid. Purification of this pink solid by column chromatography (Si02} elution with 0-75% ethyl acetate in methylene chloride) provided 1.41 g of a white powder, Overall, 4.66 g of 5-fluoro-3,4- dihydro-l,8-naphthyridin-2(lH)-one was isolated (47% yield). LC-MS: (FA) ES+ 167; NMR (400 MHz, <¾-DMSO) 5 ppm 10.7 (s, 1 H), 8.1 1 (dd, J = 8.5, 5.7 Hz, 1 H), 6.91 (dd, J = 8.8, 5.7 Hz, H), 2.91- 2.85 (m, 2 H), 2.55-2.50 (m, 2 H).
47% With N-ethyl-N,N-diisopropylamine;Palladacyle 1; In N,N-dimethyl-formamide; at 140℃; for 5h; Step 3: 5-fluoro-3,4-dihydro-1,8-naphthyridin-2(1H)-one Intermediate 31 A round bottom flask was charged with tert-butyl (4-fluoro-3-iodopyridin-2-yl)carbamate (Int-30, 20 g, 59.2 mmol), 3,3-diethoxy-1-propene (13.5 mL, 88.7 mmol), N,N-dimethylformamide (150 mL), water (50 mL), N,N-diisopropylethylamine (15.4 mL, 88.7 mmol) and the Pd catalyst ("Palladacyle 1? from Corma et. al., Tetrahedron 2005, 61(41):9848; 480 mg, 0.827 mmol) and the reaction mixture was warmed to 140 C. After 5 h, the reaction mixture was cooled in a refrigerator for 2 days. The resulting precipitate was isolated by suction filtration, washed with diethyl ether, and dried to give 3.25 g of pink needles. The filtrate was concentrated to give a reddish semi-solid. This material was redissolved in methylene chloride and the solution was passed through 200 g of silica. Concentration of the resulting solution provided a red/orange residue which was recrystallized from 2-propanol (150 mL) to give 9.4 g of a pink solid. Purification of this pink solid by column chromatography (SiO2, elution with 0-75% ethyl acetate in methylene chloride) provided 1.41 g of a white powder. Overall, 4.66 g of 5-fluoro-3,4-dihydro-1,8-naphthyridin-2(1H)-one was isolated (47% yield). LC-MS: (FA) ES+ 167; 1H NMR (400 MHz, d6-DMSO) delta ppm 10.7 (s, 1H), 8.11 (dd, J=8.5, 5.7 Hz, 1H), 6.91 (dd, J=8.8, 5.7 Hz, 1H), 2.91-2.85 (m, 2H), 2.55-2.50 (m, 2H).
 

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