1226898-92-5|tert-Butyl 2-chloro-5-oxo-7,8-dihydro-1,6-naphthyridine-6(5H)-carboxylate| Ambeed

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CAS No. :	1226898-92-5
Formula :	C₁₃H₁₅ClN₂O₃
M.W :	282.72
SMILES Code :	O=C(N1C(C2=C(N=C(Cl)C=C2)CC1)=O)OC(C)(C)C
MDL No. :	MFCD16658782

Yield	Reaction Conditions	Operation in experiment
85.73%	With ruthenium trichloride; sodium periodate; In tetrachloromethane; at 20℃;	Step 1) tert-butyl 2-chloro-5-oxo-7, 8-dihydro-1, 6-naphthyridine-6 (5H) -carboxylate [0606]To a 100 mL of dry one-neck flask were added tert-butyl 2-chloro-7, 8-dihydro-1, 6-naphthyridine-6 (5H) -carboxylate (500 mg, 1.86 mmol) , a solution of ruthenium (III) chloride (100 mg, 0.48 mmol) in tetrachloromethane (16 mL) in turn, and then sodium periodate (1.2 g, 5.6 mmol) was added, the reaction mixture was stirred at rt The reaction was monitored by TLC and LC-MS until the reaction was completed. The reaction mixture was concentrated in vacuo. The residue was diluted with water (100 mL) , and extracted with DCM (100 mL × 2) . The combined organic layers were washed with saturated aqueous NaCl (100 mL × 1) and concentrated in vacuo. The residue was purified by silica gel chromatography eluted with DCM/MeOH (V/V) 10/1 to give a yellow solid product (451 mg, 85.73) .[0607]MS-ESI: (ESI, pos. ion) m/z: 283.6 [M+1]+
74.38%	With ruthenium trichloride; sodium periodate; In tetrachloromethane; water; acetonitrile; at 15℃; for 12h;Inert atmosphere;	Sodium pentachlorate (5.49 g, 25.68 mmol, 3.00 eq) and RuCl3 (532.58 mg, 2.57 mmol, 0.30 eq) were added to a mixed solution of <strong>[1151665-15-4]tert-butyl 2-chloro-7,8-dihydro-5H-1,6-naphthyridine-6-carboxylate</strong> (2.30 g, 8.56 mmol, 1.00 eq) in acetonitrile (740.00 muL) and carbon tetrachloride (37.00 mL) and water (14.80 mL) at 15 C under the nitrogen gas atmosphere. The mixture was stirred at 15 C for 12 hours. The mixture was poured into water (20 mL) and then extracted with dichloromethane (100 mL * 4). The combined organic phases were washed with saturated brine (100 mL), dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (column height: 250 mm, diameter: 100 mm, 100 to 200 mesh silica gel, petroleum ether / ethyl acetate = 20/1 to 10/1) to deliver tert-butyl 2-chloro-5-oxo-7,8-dihydro-1,6-naphthyridine-6(5H)-carboxylate (1.80 g, 6.37 mmol, 74.38% yield) as a white solid. 1H NMR (400MHz, CDCl3): delta 8.38 (d, J = 8.3 Hz, 1H), 7.37 (d, J = 8.0 Hz, 1H), 4.13-4.04 (m, 2H), 3.24-3.12 (m, 2H), 1.60 (s, 9H). LCMS (ESI) m/z: 283 (M+1).

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H200	Unstable explosive
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H260	In contact with water releases flammable gases which may ignite spontaneously
H261	In contact with water releases flammable gas
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H371	May cause damage to organs
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H373	May cause damage to organs through prolonged or repeated exposure
Environmental hazards
Code	Phrase
H400	Very toxic to aquatic life
H401	Toxic to aquatic life
H402	Harmful to aquatic life
H410	Very toxic to aquatic life with long-lasting effects
H411	Toxic to aquatic life with long-lasting effects
H412	Harmful to aquatic life with long-lasting effects
H413	May cause long-lasting harmful effects to aquatic life
H420	Harms public health and the environment by destroying ozone in the upper atmosphere

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CAS No.: 1226898-92-5

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CAS No.: 1226898-92-5

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