5-Methoxybenzofuran-3(2H)-one Chemische Eigenschaften,Einsatz,Produktion Methoden

Synthese

5-Methoxybenzofuran-3(2H)-one is synthesised using 2-chloro-1-(2-hydroxy-5-methoxyphenyl)ethanone as raw material by chemical reaction. The specific synthesis steps are as follows:
To an ice-cooled solution of boron trichloride (1.2 equiv., 10 mmol, 10 ml of a solution of 1M BC13 in dichloromethane) under N2-atmosphere was added dropwise a solution of J (1 g, 8 mmol,) in dichloromethane (5 ml). Then, chloroacetonitrile (0.7 g, 10 mmol, 1.2 equiv. ) was added dropwise, followed by aluminum(III) chloride (0.5 g, 4 mmol, 0.5 equiv. ) in one portion. The reaction mixture was allowed to warm up to room temperature and was stirred for 6 h. The reaction mixture was diluted with dichloromethane and quenched with IN hydrochloric acid at 0°C. After stirring for 10 min, the aqueous layer was extracted with dichloromethane. The combined organic layers were washed with brine, dried (MgS04) and concentrated Purification by flash chromatography on silica gel (eluent: dichloromethane) afforded the desired product K (1 g, yield = 60percent). Intermediate K (0.15 g, 0.75 mmol, I equiv. ) and potassium acetate (0.22 g, 2.2 mmol, 3 equiv. ) were refluxed in ethanol (10 ml) for 1 h. After cooling, the reaction mixture was filtered and concentrated. The residue was mixed with water, and acidified with IN hydrochloric acid to pH = 1. The aqueous solution was extracted with ethyl acetate, the combined extracts were dried (MgS04), filtered and concentrated to afford the desired product L (110 mg, yield = 90 percent) as a pink solid The experimental procedures for the condensation reaction of compound L with 4-nitroaniline in acetic acid to form compound M, followed by Vilsmeier-Haack formulation and subsequent Knoevenagel condensation of the benzofuran carbaldehyde N with ethyl cyanoacetate to form compound 0, and finally, intramolecular cyclisation to compound 37 were performed using analogous procedures as exemplified in example 1 for the synthesis of compound f starting from compound a. Compound 37 was obtained as a yellow powder (30 mg, purity (LC) = 80 percent).

5-Methoxybenzofuran-3(2H)-one Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte

5-Methoxybenzofuran-3(2H)-one Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Firmenname	Telefon	E-Mail	Land	Produktkatalog	Edge Rate
Capot Chemical Co.,Ltd.	+86-（0）57185586718 +86-13336195806	sales@capot.com	China	29791	60
Shenzhen Nexconn Pharmatechs Ltd	+86-755-89396905 +86-15013857715	admin@nexconn.com	China	10311	58
Changzhou PBpharmaceutical R&D Co.,Ltd	0519-83990708	info@pbpharm.com	CHINA	498	58
Alchem Pharmtech,Inc.	8485655694	sales@alchempharmtech.com	United States	63687	58
Nanjing jinheyou Trading Co., Ltd.	15705188088	admin@jheyou.com	CHINA	1268	58
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	49374	58
Shanghai Rlavie Technology Co ltd	+86-021-67759270 +8617717059219	sales@rlavie.com	China	1030	58
Career Henan Chemica Co	+86-0371-86658258 +8613203830695	laboratory@coreychem.com	China	30238	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418671 +8618949823763	sales@tnjchem.com	China	34563	58
Compound Net Biotechnology Inc.	+8615303909093	sales@compound-net.com	China	2914	58

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