CN1228332C - Chemical synthesis method of 3-(2-chlorophenyl)-5-methyl-4-isoxazole formyl chloride - Google Patents

Chemical synthesis method of 3-(2-chlorophenyl)-5-methyl-4-isoxazole formyl chloride Download PDF

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CN1228332C
CN1228332C CN 03116221 CN03116221A CN1228332C CN 1228332 C CN1228332 C CN 1228332C CN 03116221 CN03116221 CN 03116221 CN 03116221 A CN03116221 A CN 03116221A CN 1228332 C CN1228332 C CN 1228332C
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methyl
chloro
phenyl
isoxzzole
chlorophenyl
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CN1535960A (en
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苏为科
李永曙
许进
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Zhejiang University of Technology ZJUT
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Zhejiang University of Technology ZJUT
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Abstract

Chlorophenyl)-5-methyl-4-isoxazole formyl chloride is a pivotal intermediate body of cloxacillin. The present invention uses di(trichloromethyl) carbonate to replace thionyl chloride, or phosphorus oxychloride, or phosphorus pentachloride, or phosphorus trichloride, or phosgene, or diphosgene, and the di(trichloromethyl) carbonate directly reacts with 3-(2-chlorophenyl)-5-methyl-4-isoxazole methanoic acid to synthesize the 3-(2-chlorophenyl)-5-methyl-4-isoxazole formyl chloride. The chemical synthetic method eliminates a potential safety hazard and a source of waste water, waste gas and waste slag from a technical source. The present invention is a preparation method of 3-(2-chlorophenyl)-5-methyl-4-isoxazole formyl chloride, which has the advantages of low price of raw material, easy acquirement of raw material, safe and reliable preparation, high reaction yield, low preparation cost and almost no generation of three kinds of waste.

Description

The chemical synthesis process of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formyl chloride
Technical field
The present invention relates to two (trichloromethyl) carbonic ethers [bis (trichloromethyl) carbonate] of a kind of usefulness and substitute sulfur oxychloride or phosphorus oxychloride or phosphorus pentachloride or phosphorus trichloride or phosgene or trichloromethylchloroformate directly and the chemical synthesis process of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid prepared in reaction 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formyl chloride 3-(2-Chlorophenyl)-5-Methyl-4-Chloro-Carbonyl Isoxazole, 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formyl chloride is the key intermediate of Cloxacilin.
Background technology
Before the present invention makes, the chemical synthesis process of prior art 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formyl chloride is to be that raw material reaction makes with sulfur oxychloride or phosphorus oxychloride or phosphorus pentachloride or phosphorus trichloride and 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid, as US 2996501 (1961).The shortcoming of this technology be use in the world that control uses than toxogen material sulfur oxychloride or phosphorus oxychloride or phosphorus pentachloride or phosphorus trichloride, production security is poor, and reaction time is long, and equipment corrosion is serious, trouble is that quantity of three wastes is big, and difficult treatment, expense height.
Summary of the invention
Task of the present invention is the shortcoming that overcomes prior art, provides that a kind of technology is reasonable, production safety is reliable, reaction yield is high, production cost is low, does not have 3-(2-the chloro-phenyl-)-5-methyl-4-isoxzzole formyl chloride chemical synthesis process of the three wastes substantially.
The chemical synthesis process of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formyl chloride, it is characterized in that two (trichloromethyl) carbonic ethers make with 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid reaction in organic solvent under the effect of catalyzer, its molar ratio is 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: catalyzer=1: 0.34~0.5: 0.001-0.5, consumption of organic solvent is 3-15 a times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality, its temperature of reaction is 20~130 ℃, reaction times is 1~10 hour, and its reaction equation is:
Figure C0311622100041
3-(2-Chloro-phenyl)-5-methyl
3-(2-chlorophenyl)-5-Methyl-4-
-isoxazole-4-carboxylic?acid
Chloro-carbonyl?Isoxazole
Organic solvent can be tetrahydrofuran (THF) or ethyl acetate or benzene or toluene or dimethylbenzene or chlorobenzene or orthodichlorobenzene or Meta Dichlorobenzene or santochlor or trichloromethane or tetracol phenixin or ethylene dichloride.
Catalyzer can be triethylamine or pyridine or 3-picoline or N-methylpyrrole or N-methyl Pyrrolidine or N, dinethylformamide or tetrabutyl urea.
The present invention compared with prior art, the operational path advanced person, processing condition are reasonable, and used raw material has been avoided sulfur oxychloride or phosphorus oxychloride or phosphorus pentachloride or the phosphorus trichloride or the hypertoxic phosgene and the trichloromethylchloroformate of poison, and production safety is reliable, the reaction yield height, generally more than 95%, production cost is lower, and equipment corrosion is little, few and the easy processing of the three wastes has bigger implementary value and economic results in society.
Embodiment
Embodiment 1
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: tetrabutyl urea=1: 0.33: 0.02 (mol ratio), toluene consumption are 10 times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality.After even, drip the toluene solution of two (trichloromethyl) carbonic ethers at room temperature 45 minutes, open chlorine hydride absorption system simultaneously, be warming up to 110 ℃ then, back flow reaction 2 hours, toluene was reclaimed in underpressure distillation after reaction finished, the last cut of collecting 130-132 ℃ under 0.667KPa, freezing curing down.Yield 95.6%, fusing point are 42-43 ℃, content (HPLC) 99.6%.
Embodiment 2
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: tetrabutyl urea=1: 0.5: 0.01 (mol ratio), orthodichlorobenzene consumption are 5 times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality.
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid, tetrabutyl urea and orthodichlorobenzene are added in the reactor, after stirring, drip the tetrahydrofuran solution of two (trichloromethyl) carbonic ethers at room temperature 30 minutes, open chlorine hydride absorption system simultaneously, be warming up to 145-150 ℃ of reaction 1 hour then, reaction is finished, orthodichlorobenzene is reclaimed in elder generation's underpressure distillation, and 130-132 ℃ cut is collected in vacuum distilling then under 0.667KPa, freezing curing, yield 96.0%, fusing point are 41-42 ℃, content (HPLC) 99.2%.
Embodiment 3
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: tetrabutyl urea=1: 0.50: 0.01 (mol ratio), the orthodichlorobenzene consumption of recovery are 5 times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality.
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid, the orthodichlorobenzene of tetrabutyl urea and recovery is added in the reactor, after stirring, drips the o-dichlorobenzene solution of two (trichloromethyl) carbonic ethers at room temperature 45 minutes, and other is with embodiment 2.Yield 96.6%, fusing point are 41-42 ℃, content (HPLC) 99.0%.
Embodiment 4
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: tetrabutyl urea=1: 0.75: 0.01 (mol ratio), the orthodichlorobenzene consumption of recovery are 5 times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality.
Operation is with embodiment 3.Yield 97%, fusing point are 40-42 ℃, content (HPLC) 98.5%.
Embodiment 5
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: tetrabutyl urea=1: 0.5: 0.01 (mol ratio), tetrahydrofuran (THF) consumption are 8 times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality.
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid, tetrabutyl urea and tetrahydrofuran (THF) are added in the reactor, after stirring, drip the tetrahydrofuran solution of two (trichloromethyl) carbonic ethers at room temperature 30 minutes, open chlorine hydride absorption system simultaneously, be warming up to backflow then, held stationary back flow reaction 3 hours, other is with embodiment 2.Yield 95.8%, fusing point are 42.5-43 ℃, content (HPLC) 99.8%.
Embodiment 6
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: tetrabutyl urea=1: 0.5: 0.05 (mol ratio), benzene consumption are 10 times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality.
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid, tetrabutyl urea and benzene are added in the reactor, after stirring, drip the benzole soln of two (trichloromethyl) carbonic ethers at room temperature 30 minutes, open chlorine hydride absorption system simultaneously, be warming up to 80 ℃ then, back flow reaction 5 hours, solvent is reclaimed in elder generation's air distillation, and 130-132 ℃ cut is collected in vacuum distilling then under 0.667KPa, freezing curing down, yield 97.1%, fusing point 42-43 ℃, content (HPLC) 99.6%.
Embodiment 7
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether=1: 0.5 (mol ratio), tetrahydrofuran (THF) consumption are 8 times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality.
3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid and tetrahydrofuran (THF) are added in the reactor, after stirring, drip the tetrahydrofuran solution of two (trichloromethyl) carbonic ethers at room temperature 30 minutes, open chlorine hydride absorption system simultaneously, temperature rising reflux to 31 ℃ reaction is 9 hours then, reaction is finished, and other is with embodiment 1.Yield 95.8%, fusing point 42-43 ℃, content (HPLC) 99.5%.
The present invention compares with traditional technology, has production safety, equipment corrosion is little, and is easy to operate, and reaction time is short, raw material is easy to get, the reaction yield height, the few and easy processing of the three wastes, advantages such as good product quality, and byproduct hydrogen chloride absorbs through double tower and can prepare 30% technical hydrochloric acid, is one and is suitable for industrialized method.

Claims (3)

1, the chemical synthesis process of a kind of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formyl chloride, it is characterized in that two (trichloromethyl) carbonic ethers make with 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid reaction under the effect of catalyzer in organic solvent, its molar ratio is 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid: two (trichloromethyl) carbonic ether: catalyzer is 1: 0.34~0.5: 0.001-0.5; Its consumption of organic solvent is 3-15 a times of 3-(2-chloro-phenyl-)-5-methyl-4-isoxzzole formic acid quality; Its temperature of reaction is 20-150 ℃; Its reaction times is 1~10h.
2,, it is characterized in that organic solvent can be tetrahydrofuran (THF) or ethyl acetate or benzene or toluene or dimethylbenzene or chlorobenzene or orthodichlorobenzene or Meta Dichlorobenzene or santochlor or trichloromethane or tetracol phenixin or ethylene dichloride as the said chemical synthesis process of claim 1.
3,, it is characterized in that catalyzer can be triethylamine or pyridine or 3-picoline or N-methylpyrrole or N-methyl Pyrrolidine or N, dinethylformamide or tetrabutyl urea as the said chemical synthesis process of claim 1.
CN 03116221 2003-04-03 2003-04-03 Chemical synthesis method of 3-(2-chlorophenyl)-5-methyl-4-isoxazole formyl chloride Expired - Fee Related CN1228332C (en)

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CN100467455C (en) * 2007-02-14 2009-03-11 浙江工业大学 Synthetic method for 3-(2'-chloro-6'-fluorophenyl)-5-methyl-4-isooxazole formyl chloride
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