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methyl 3'-acetyl-[1,1'-biphenyl]-4-carboxylate[ No CAS ]
Yield
Reaction Conditions
Operation in experiment
229 mg (90%)
With potassium fluoride;palladium diacetate; In tetrahydrofuran;
EXAMPLE 31 Synthesis of 4-carbomethoxy-3'-acetylbiphenyl An oven dried resealable Schlenk tube was evacuated and backfilled with argon and charged with palladium acetate (2.2 mg, 0.01 mmol, 1.0 mol %), 2-(di-tert-butylphosphino)biphenyl (6.0 mg, 0.020 mmol, 2.0 mol %), 3-acetylphenyl boronic acid (246 mg, 1.5 mmol), potassium fluoride (174 mg, 3.0 mmol), and methyl-4-chlorobenzoate (171 mg, 1.0 mmol). The tube was evacuated and backfilled with argon, and THF (1 mL) was added through a rubber septum. The tube was sealed with a teflon screwcap, and the reaction mixture was stirred at room temperature until the starting aryl chloride had been completely consumed as judged by GC analysis. The reaction mixture was then diluted with ether (30 mL) and poured into a separatory funnel. The mixture was washed with water (20 mL), and the aqueous layer was extracted with ether (20 mL). The combined organic layers were washed with brine (20 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated. The crude material was purified by flash chromatography on silica gel to afford 229 mg (90%) of the title compound.
229 mg (90%)
With potassium fluoride;palladium diacetate; In tetrahydrofuran;
Example 31 Synthesis of 4-carbomethoxy-3'-acetylbiphenyl An oven dried resealable Schlenk tube was evacuated and backfilled with argon and charged with palladium acetate (2.2 mg, 0.01 mmol, 1.0 mol %), 2-(di-tert-butylphosphino)biphenyl (6.0 mg, 0.020 mmol, 2.0 mol %), 3-acetylphenyl boronic acid (246 mg, 1.5 mmol), potassium fluoride (174 mg, 3.0 mmol), and methyl-4-chlorobenzoate (171 mg, 1.0 mmol). The tube was evacuated and backfilled with argon, and THF (1 mL) was added through a rubber septum. The tube was sealed with a teflon screwcap, and the reaction mixture was stirred at room temperature until the starting aryl chloride had been completely consumed as judged by GC analysis. The reaction mixture was then diluted with ether (30 mL) and poured into a separatory funnel. The mixture was washed with water (20 mL), and the aqueous layer was extracted with ether (20 mL). The combined organic layers were washed with brine (20 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated. The crude material was purified by flash chromatography on silica gel to afford 229 mg (90%) of the title compound.
from <strong>[13925-00-3]2-<strong>[13925-00-3]ethylpyrazine</strong></strong> and methyl 4-chlorobenzoate there is obtained 4'-chloro-2-(2-pyrazinyl)-propiophenone, m.p. 85°;
With potassium phosphate tribasic hydrate; NiIICl(1-naphthyl)(tricyclohexylphosphine)2; tricyclohexylphosphine; In tetrahydrofuran; at 23℃; for 2h;Inert atmosphere; Glovebox; Sealed tube;
General procedure: Cross-Coupling of ortho-, meta-, and para-Substituted, Electron-Rich and Electron-Deficient Aryl Halides and Aryl Mesylates with Aryl Neopentylglycolboronates Catalyzed by NiIICl(1-naph-thyl)(PCy3)2/PCy3 in Anhydrous THF at 23 °C; General Procedure 2In an oven-dried test tube charged with a Teflon coated stirring barwere added aryl halide or aryl mesylate (0.3 mmol), aryl neopentyl-glycolboronates (0.315 mmol), K3PO4(H2O)3.2 (191.00 ± 1.00 mg, 0.9mmol), and NiIICl(1-naphthyl)(PCy3)2 (11.73 ± 0.0510 mg, 0.015mmol, 5percent catalyst loading). The test tube was brought into a N2 filledglove box (moisture level <2 ppm) through three degassing cycles andPCy3 (8.4 mg, 0.03 mmol, 10percent loading) ligand was added. Distilled sol-vent (1 mL) was added inside the glove box and the test tube wassealed by a rubber septum and left stirring at 23 °C. A sample was tak-en by syringe and transferred outside the glove box. The sample wasdiluted by distilled THF (0.2 mL) and filtered through a short columnof Al2O3. The filtrate was concentrated and the GC analysis was car-ried out. The reaction mixture was diluted with CH2Cl2 (2 mL), filteredthrough a layer of Al2O3, and washed with CH2Cl2 (3 1 mL). The fil-trate was collected and concentrated under vacuum. The crude prod-uct was purified by column chromatography on silica gel with EtO-Ac/hexane mixture as eluent. The reductive elimination side-productwas also isolated and characterized.
96%
With cesium fluoride;palladium diacetate; CyJohnPhos; In 1,4-dioxane; at 25℃; for 18h;Product distribution / selectivity;
A Schlenk tube was charged with aryl halide (0.67 mmol, 1.0 equiv), aryl boronate ester (0.81 mmol, 1.2 equiv), potassium phosphate or CsF (3.0 equiv), Pd catalyst (0.1 equiv), 2-(dicyclohexylphosphino)biphenyl (0.2 equiv) (co-ligand was used in the presence of Pd(OAc)2 as catalyst and CsF as base (see Table 8, entries 13-15); reaction was performed at rt) and a Teflon coated stirbar. The reaction mixture was evacuated three times for ten minutes under high vacuum and backfilled with N2. Dry dioxane was added via the T-neck and the reaction mixture was heated to 110 0C for 18 h. The reaction mixture was cooled to room <n="24"/>temperature and diluted with DCM (10 rnL). The solution was filtered and the filtrated washed with DCM (100 mL). The filtrate was concentrated and purified by silica gel chromatography.
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