2,4,6-콜리딘

2,4,6-콜리딘 속성

2,4,6-콜리딘 MSDS

2,4,6-Trimethylpyridine

2,4,6-콜리딘 C화학적 특성, 용도, 생산

화학적 성질

colourless liquid

용도

2,4,6-Collidine is an reagent used for various synthetic preparations such as the synthesis of methylated pyridines by three-componet catalytic condensation of acetylene, acetone and ammonia.

정의

Methyl, ethyl, propyl, and trimethyl homologs of pyridine.

일반 설명

2,4,6-Trimethylpyridine is a pyridine derivative. It has a pK of 7.4. The product can react with trifluoroiodomethane in cyclopentane solution to afford 1:1 complex. This complex was investigated by NMR (Nuclear Magnetic Resonance) spectroscopy. Collidine-buffered osmium tetroxide solutions have been prepared by adding osmium tetroxide solution to it. These solutions have been used as fixative for electron microscopic studies.
2,4,6-Trimethylpyridine can undergo oxidation with potassium permanganate to form 2,4,6-pyridinetricarboxylic acid.

위험도

Toxic.

Purification Methods

Commercial samples may be grossly impure. Likely contaminants include 3,5-dimethylpyridine, 2,3,6-trimethylpyridine and water. Brown, Johnson and Podall [J Am Chem Soc 76 5556 1954] fractionally distilled 2,4,6-trimethylpyridine under reduced pressure through a 40cm Vigreux column (p 11) and added to 430mL of the distillate slowly, with cooling to 0o, 45g of BF3-diethyl etherate. The mixture was again distilled, and an equal volume of dry *benzene was added to the distillate. Dry HCl was passed into the solution, which was kept cold in an ice-bath, and the hydrochloride was filtered off. It was recrystallised from absolute EtOH (1.5mL/g) to m 286-287o[m 256o(sealed tube), also m 293-294o subliming slowly]. The free base was regenerated by treatment with aqueous NaOH, then extracted with *benzene, dried (MgSO4) and distilled under reduced pressure. Sisler et al. [J Am Chem Soc 75 446 1953] precipitated trimethylpyridine as its phosphate from a solution of the base in MeOH by adding 85% H3PO4, shaking and cooling. The free base was regenerated as above. Garrett and Smythe [J Chem Soc 763 1903] purified the trimethylpyridine via the HgCl2 complex. It is more soluble in cold than hot H2O [the solubility is 20.8% at 6o, 3.5% at 20o, 1.8% at 100o]. Alternatively, purify it by dissolving it in CHCl3, adding solid K2CO3 and Drierite, filtering and fractionally distilling through an 8in helix-packed column. The sulfate has m 205o, and the picrate (from hot H2O) has m 155-156o. [Frank & Meikle J Am Chem Soc 72 4184 1950, Beilstein 20 H 250, 20 I 87, 20 II 164, 20 III/IV 2810, 20/6 V 93.]

2,4,6-콜리딘 준비 용품 및 원자재

원자재

준비 용품

2,4,6-콜리딘 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Nanjing Sinoda Biological Technology Co., Ltd	+8613401983379	sales@njmcn.cn	CHINA	74	58
Nanjing Yushan Wanfang Biotechnology Co., Ltd.	+86-025-84918180 +86-18014482516	3552541679@qq.com	China	997	58
Firsky International Trade (Wuhan) Co., Ltd	+8615387054039	admin@firsky-cn.com	China	427	58
Hebei Saisier Technology Co., LTD	+86-18400010335 +86-18034520335	admin@hbsaisier.cn	China	1015	58
Hebei Longbang Technology Co., LTD	+86-18633929156 +86-18633929156	admin@hblongbang.com	China	941	58
HebeiShuoshengImportandExportco.,Ltd	+86-18532138899 +86-18532138899	L18532138899@163.com	China	939	58
Capot Chemical Co.,Ltd.	+86-（0）57185586718 +86-13336195806	sales@capot.com	China	29791	60
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21639	55
Nanjing ChemLin Chemical Industry Co., Ltd.	025-83697070	product@chemlin.com.cn	CHINA	3009	60
ATK CHEMICAL COMPANY LIMITED	+undefined-21-51877795	ivan@atkchemical.com	China	32820	60

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