4-Bromo-2,6-difluorobenzaldehyde

4-Bromo-2,6-difluorobenzaldehyde 속성

4-Bromo-2,6-difluorobenzaldehyde C화학적 특성, 용도, 생산

Synthesis

n-Butyl lithium (0.64ml, 1.2 mmol) was added drop wise to a solution of diisopropyl amine (0.25 mL, 1.5 mmol) in dry THF at -78°C under nitrogen atmosphere over a period of 5 minutes. The reaction mixture was stirred at -20°C for 30 minutes. To this was added 5-bromo-benzo[b]thiophene (200 mg, 0.938 mmol) in dry THF at -78°C, continued stirring for a further 30 minutes at -78°C, followed by the addition of N-chlorosuccinamide (225 mg, 1.68 mmol) in dry THF at -78°C. The resulting mixture was stirred at room temperature for 2 hours. The reaction was monitored by TLC (100% hexane). The reaction mixture was partitioned between ethyl acetate and saturated ammonium chloride. The organic layer was dried over sodium sulfate and concentrated to afford the crude product. Purification by column chromatography on silica gel (100% hexane) afforded the product. Preparation of Intermediate 4-Bromo-2,6-difluoro-benzaldehyde (I-26a): Using analogous reaction condition and reagents as described in Example 20 for the preparation of 1-20a above, 1-bromo-3,5-difluoro-benzene (2 g, 2.10.36 mmol) in THF was reacted with DMF (1.43 g,19.68 mmol), n-butyl lithium (1.56 ml, 12.4 mmol) and diisopropyl amine (0.57 mL, 15.5 mmol) to afford crude product. Purification by column chromatography on silica gel (2% ethyl acetate in hexane) afforded 1.35 g of the product (61% yield). 1H NMR (CDCl3, 300 MHz): δ 11.5-11.0 (s, 1H), 7.4-7.2 (dd, 2H).

4-Bromo-2,6-difluorobenzaldehyde 준비 용품 및 원자재

원자재

준비 용품

4-Bromo-2,6-difluorobenzaldehyde 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Changzhou Ditong Chemical Co.,Ltd	+86-0519-88299272	info@edengenechem.com	China	2158	58
Changzhou Anxuan Chemical Co., Ltd	+86-0519-89882563 +86-18961279162	andy@anxuanchem.com	China	4327	58
Shanghai Scochem Technology Co., Ltd	+86-021-33758897 +86-13701882790	sales@scochem.com	China	1977	58
Hebei Weibang Biotechnology Co., Ltd	+8615531157085	abby@weibangbio.com	China	8807	58
Hebei Mojin Biotechnology Co., Ltd	+86 13288715578 +8613288715578	sales@hbmojin.com	China	12834	58
Capot Chemical Co.,Ltd.	+86-（0）57185586718 +86-13336195806	sales@capot.com	China	29791	60
Fluoropharm Co., Ltd.	+86-0571-85586753; +8613336034509	sales@fluoropharm.com	China	1376	60
ATK CHEMICAL COMPANY LIMITED	+undefined-21-51877795	ivan@atkchemical.com	China	32956	60
Zjartschem	+86-571 87238903	jocelynpan@zjarts.com	CHINA	988	58
career henan chemical co	+86-0371-86658258 +8613203830695	sales@coreychem.com	China	29880	58

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