2,5-디메톡시벤즈알데히드

2,5-디메톡시벤즈알데히드 속성

2,5-디메톡시벤즈알데히드 MSDS

2,5-Dimethoxybenzaldehyde

2,5-디메톡시벤즈알데히드 C화학적 특성, 용도, 생산

용도

의료용 중간체로 사용.

보관

실온에서 직사 광선으로부터 멀리하십시오.

화학적 성질

yellow crystalline solid

용도

2,5-Dimethoxybenzaldehyde is used in the preparation of 2,5-dimethoxyphenethylamine, which is utilized to prepare psychoactive drugs such as 2,5-dimethoxy-4-bromophenethylamine, 2,5-dimethoxy-4-iodophenethylamine and 4-Chloro-2,5-dimethoxy-phenethylamine. It acts as an intermediate in organic synthesis.

주요 응용

2,5-Dimethoxybenzaldehyde, also known as 2C-H, is an organic compound and a benzaldehyde derivative. It can be used to produce 2,5-dimethoxyphenethylamine. 2C-H is also used to produce many other substituted phenethylamines such as 2C-B, 2C-I and 2C-C.

제조 방법

2,5-Dimethoxybenzaldehyde synthesis: Anethole is oxidized to anisaldehyde , which after isolation is subjected to a BaeyerVilliger oxidation reaction with performic or peracetic acid. The O-formyl-4-methoxyphenol obtained this way is hydrolyzed . 4-Methoxyphenol is subsequently formylated using the Reimer-Tiemann method and the obtained 2-hydroxy-5-methoxybenzaldehyde is methylated with dimethylsulfate to 2,5-dimethoxybenzaldehyde.
Reaction
A : Anisaldehyde from anethole via oxidative cleavage: 20 g anise oil was suspended in a mixture of 150 mL water and 30 mL conc. sulfuric acid; addition of 55 g sodium bichromate at such a rate that the temperature did not exceed 40°C. The reaction mixture was extracted with 4 x 125 mL toluene and the solvent evaporated. The residual oil was vacuum distilled to yield 9.1 g anisaldehyde.
B : O-formyl-4-methoxyphenol: 6 mL anisaldehyde was dissolved in 75 mL dichloromethane (DCM). A mixture of 12 g hydrogen peroxide and 10 mL conc. formic acid was added over 30 min. The reaction mixture was gently refluxed for 21 h.
C: B 4-methoxyphenol: Evaporating the solvent from reaction mixture and taking up the residue in 100 mL aqueous NaOH (20%) (25 mL MeOH as co-solvent) yielded 4.1 g 4-methoxyphenol as a white crystalline product after the usual work-up and purification steps.
D : Reimer-Tiemann formylation of 4-methoxyphenol: 124.1 g 4-methoxyphenol was dissolved in NaOH solution (320 g NaOH in 400 mL water). In total, 161 mL chloroform was added. The usual work-up and steam distillation yielded 109.8 g of a clear yellow oil that did not solidify upon standing at room temperature (GC/MS: 94% 2-hydroxy-5-methoxybenzaldehyde).
E: D Methylation of 2-hydroxy-5-methoxybenzaldehyde: The yellow oil from was used without further purification. A 250 mL RB flask was charged with 100 mL acetone, 14 g anhydrous potassium carbonate and 10 g 2-hydroxy-5-methoxybenzaldehyde; the mixture was brought at reflux temperature and 11 g dimethyl sulfate was added. The reaction was continued for 4 hours. The solvent is evaporated and the crude end product crystallized in cold water. Recrystallization from EtOH/water yielded 8.3 g 2,5-dimethoxybenzaldehyde (GC/MS: 98%+ 2,5-dimethoxybenzaldehyde)

2,5-디메톡시벤즈알데히드 준비 용품 및 원자재

원자재

준비 용품

2,5-디메톡시벤즈알데히드 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Jinan Finer Chemical Co., Ltd	+86-531-88989536 +86-15508631887	sales@finerchem.com	China	2966	58
Shanghai Longyu Biotechnology Co., Ltd.	+8615821988213	info@longyupharma.com	China	2531	58
Hebei Yanxi Chemical Co., Ltd.	+8617531190177	peter@yan-xi.com	China	5993	58
Wuhu Nuowei chemistry Co., Ltd.	+86-0553-2911116-802 +undefined17756524438	sales1@nuowei-chem.com	China	1642	58
Jiangsu shring Biopharma Co., Ltd.	+8613372282299	sales@shringchem.com	China	3545	58
Hebei Guanlang Biotechnology Co,.LTD	+8619930503252	daisy@crovellbio.com	China	5964	58
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12453	58
Hebei Anlijie Biotechnology Co., Ltd	+8619031013551	ably@aljbio.com	China	177	58
Dorne Chemical Technology co. LTD	+86-13583358881 +86-18560316533	Ethan@dornechem.com	China	293	58
Nanjing Deda New Material Technology Co., Ltd	+8613223293093	bella@njdeda.com	China	81	58

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