CN112358462A - Synthetic method of piperonyl derivatives - Google Patents

Synthetic method of piperonyl derivatives Download PDF

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CN112358462A
CN112358462A CN202011249863.4A CN202011249863A CN112358462A CN 112358462 A CN112358462 A CN 112358462A CN 202011249863 A CN202011249863 A CN 202011249863A CN 112358462 A CN112358462 A CN 112358462A
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刘正超
罗红
刘维文
张菊华
王婷
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Chengdu D Innovation Pharmaceutical Co ltd
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    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D317/00Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
    • C07D317/08Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3
    • C07D317/44Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D317/46Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms having the hetero atoms in positions 1 and 3 ortho- or peri-condensed with carbocyclic rings or ring systems condensed with one six-membered ring
    • C07D317/48Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring
    • C07D317/62Methylenedioxybenzenes or hydrogenated methylenedioxybenzenes, unsubstituted on the hetero ring with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to atoms of the carbocyclic ring
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Abstract

The invention provides a synthesis method of a piperonyl ring derivative, which prepares a 7-bromobenzo [ D ] [1,3] dioxol-4-one piperonyl ring derivative through acylation reaction, substitution reaction and reaction with dihalomethane. The method has the advantages of high yield, high purity, short synthesis steps, conventional and easily-obtained starting materials, low cost and environmental friendliness, and has good industrial application prospect.

Description

Synthetic method of piperonyl derivatives
Technical Field
The invention belongs to the technical field of synthesis, and particularly relates to a synthesis method of a piperonyl cycloderivative.
Background
The chemical name of the piperonyl is 1, 3-benzodioxole, the piperonyl butoxide is an important intermediate for synthesizing pesticide synergist piperonyl butoxide and berberine as medicine, and a series of fine chemicals with high added value can be derived by introducing various groups on benzene ring and methylene, and the piperonyl can be widely applied to the fields of spices, pesticides, medicines and the like.
The pepper ring structure unit is closely related to the anti-tumor activity, the derivative thereof has good cytotoxic activity to human colon cancer cells and nasopharyngeal carcinoma cells with multiple drug resistance, and the in-vivo drug effect of the derivative also shows excellent tumor inhibition activity. The 7-bromobenzo [ D ] [1,3] dioxol-4-one substance belongs to piperonyl derivatives and is a key intermediate for drug synthesis. However, the price of the currently marketed 7-bromobenzo [ D ] [1,3] dioxol-4-one is high, for example, the price of 1- (7-bromobenzo [ D ] [1,3] dioxol-4-yl) ethan-1-one (CAS: 1892297-18-6) marketed reaches hundreds of dollars per gram, and the purity only reaches 95% -98%, which hinders the further application of the compound as a pharmaceutical intermediate.
Therefore, the synthesis method of the-bromobenzo [ D ] [1,3] dioxol-4-one piperonylenecarbon derivatives, which has the advantages of high yield, high purity, short synthesis steps, conventional and easily-obtained starting materials, low cost, environmental friendliness and industrial production prospect, is of great significance.
Disclosure of Invention
The invention provides a synthesis method of a piperonyl cycloderivative, which comprises the following steps:
(1) carrying out substitution reaction on the compound shown in the formula I and bromine under the action of alkali to obtain a compound shown in a formula II;
(2) reacting the compound shown in the formula II obtained in the step (1) with dihalomethane under the action of inorganic base to obtain a piperonyl-cyclo derivative shown in the formula III;
the reaction route is as follows:
Figure BDA0002771264870000011
wherein R is C1~5Alkyl, preferably R is methyl.
Further, the base in the step (1) is selected from tert-butylamine, diisopropylethylamine, triethylamine, N-methylmorpholine, triethylenediamine or tetramethylethylenediamine; or, the inorganic base in the step (2) is selected from sodium carbonate, potassium carbonate, cesium carbonate, sodium hydroxide or potassium hydroxide, and the dihalomethane is selected from dichloromethane, dibromomethane or diiodomethane.
Further, the molar ratio of the compound shown in the formula I in the step (1) to the bromine and the alkali is 1 (1-2) to 2-5; the reaction conditions are as follows: reacting for 1-3 hours at-10 to-50 ℃ in an organic solvent; preferably, the organic solvent is selected from toluene, xylene, dichloromethane, chloroform, carbon tetrachloride, dichloroethane.
Further, the step (1) further comprises the following post-processing steps: heating to room temperature, filtering to obtain a filter cake, adding a purifying agent A, heating for refluxing, cooling to room temperature, stirring, filtering to obtain a filter cake, washing with the purifying agent A again, and drying; the purifying agent A is selected from petroleum ether, n-hexane, toluene and dichloromethane, and is preferably petroleum ether.
Further, the molar ratio of the compound shown in the formula II in the step (2) to the dihalomethane and the inorganic base is 1 (1-2) to 2-5; the reaction conditions are as follows: reacting in an organic solvent at 70-160 ℃ for 4-5 hours; preferably, the organic solvent is selected from the group consisting of N, N-dimethylformamide, dimethyl sulfoxide, N-methylpyrrolidone, dioxane, acetonitrile.
Further, the step (2) further comprises the following post-processing steps: cooling to room temperature, adjusting pH to acidity, extracting, drying, concentrating, adding a purifying agent B, heating and refluxing, cooling to room temperature, stirring, filtering to obtain a filter cake, and drying; the purifying agent B is selected from n-heptane, n-hexane, petroleum ether, toluene and dichloromethane, and is preferably n-heptane.
Further, the compound shown in the formula I is obtained by reacting catechol with an acylating agent under the action of Lewis acid.
Furthermore, the molar ratio of the catechol to the acylating agent to the Lewis acid is 1 (1-2) to 2-5, and the reaction conditions are as follows: reacting in an organic solvent or without adding a solvent, wherein the reaction temperature range is as follows: the reaction time is 3-4 hours from room temperature to the reflux temperature of the organic solvent; preferably, the organic solvent is selected from dichloromethane, dichloroethane, nitromethane, nitrobenzene, carbon disulfide. Still further, the following post-processing steps are included: quenching reaction at room temperature, extracting, separating, collecting organic phase, concentrating, adding purifying agent C, stirring at room temperature, pulping, filtering, and oven drying filter cake; the purifying agent C is selected from n-heptane, n-hexane, petroleum ether, toluene and dichloromethane, and is preferably n-heptane. The method of quenching the reaction is preferably by adding water or hydrochloric acid.
Experimental results show that the synthesis method for preparing the piperonyl cycloderivatives has the advantages of high yield, high purity, short synthesis steps, conventional and easily-obtained starting materials, low cost and environmental friendliness, and has good application prospects.
Obviously, many modifications, substitutions, and variations are possible in light of the above teachings of the invention, without departing from the basic technical spirit of the invention, as defined by the following claims.
The present invention will be described in further detail with reference to the following examples. This should not be understood as limiting the scope of the above-described subject matter of the present invention to the following examples. All the technologies realized based on the above contents of the present invention belong to the scope of the present invention.
Detailed Description
The starting materials used in the present invention are all known products, obtained by purchasing commercially available products.
Example 1 Synthesis of 2, 3-dihydroxy acetophenone (Compound of formula I)
Adding zinc dichloride (34.1g, 0.25mol) and acetic acid (9.0g, 0.15mol) into a reaction bottle, heating to 80 ℃, stirring to dissolve, adding catechol (11g, 0.1mol), heating to 100 ℃, and reacting for 4 hours. Cooling to room temperature, adding water (200ml) to quench the reaction, extracting with ethyl acetate (100ml × 3 times), mixing the organic phases, concentrating to dryness to obtain a crude product, adding n-heptane (100ml), stirring and pulping at room temperature for 1h, filtering, and drying the filter cake to obtain 12.2g of 2, 3-dihydroxy acetophenone, with a yield of 80.3% and a purity of 98.8%.
Example 2 Synthesis of 2, 3-dihydroxy acetophenone (Compound of formula I)
Aluminum trichloride (33.34g, 0.25mol), acetyl chloride (9.42g, 0.12mol) and methylene chloride (550ml) were added to a reaction flask, stirred for 30 minutes, and then catechol (11g, 0.1mol) was added, and reacted at room temperature for 3 hours after the addition. The reaction was quenched by the addition of 2N hydrochloric acid (200ml), the layers were separated, and the organic phase was washed with tap water (150 ml. times.2) and dried over anhydrous sodium sulfate. Filtering, concentrating the filtrate to obtain crude product, adding n-heptane (100ml), stirring and pulping at room temperature for 1h, filtering, and oven drying the filter cake to obtain 12.7g of 2, 3-dihydroxy acetophenone with yield of 83.6% and purity of 98.6%.
Example 3 Synthesis of 2, 3-dihydroxy-4-bromoacetophenone (Compound of formula II)
Adding tert-butylamine (28.5g, 0.39mol) and toluene (100ml) into a reaction bottle, cooling to-10-15 ℃, dropwise adding bromine (33.6g, 0.21mol), continuously cooling to-30-40 ℃ after dropwise adding, dropwise adding a toluene (100ml) solution of 2, 3-dihydroxyacetophenone (20g, 0.13mol), and keeping the temperature of-30-40 ℃ for reaction for 2 hours after dropwise adding. Heating to room temperature, and filtering to obtain a crude product. Adding 250ml of petroleum ether, heating and refluxing for 1h, cooling to room temperature, stirring for 2h, filtering, washing a filter cake by using a small amount of petroleum ether, and drying to obtain 26.5g of 2, 3-dihydroxy-4-bromoacetophenone with the yield of 87.2%. The purity is 98.3%.
Example 4 Synthesis of 2, 3-dihydroxy-4-bromoacetophenone (Compound of formula II)
Adding diisopropylethylamine (50.4g, 0.39mol) and toluene (100ml) into a reaction bottle, cooling to-10-15 ℃, dropwise adding bromine (33.6g, 0.21mol), continuously cooling to-30-40 ℃ after dropwise adding, dropwise adding a toluene (100ml) solution of 2, 3-dihydroxyacetophenone (20g, 0.13mol), and reacting for 2.5h at-30-40 ℃. Heating to room temperature, and filtering to obtain a crude product. Adding 250ml of petroleum ether, heating and refluxing for 1h, cooling to room temperature, stirring for 2h, filtering, washing a filter cake by using a small amount of petroleum ether, and drying to obtain 24.7g of 2, 3-dihydroxy-4-bromoacetophenone with the yield of 81.3%. The purity is 98.2%.
EXAMPLE 5 Synthesis of the Piperazinocycle derivative 1- (7-bromobenzo [ d ] [1,3] dioxol-4-yl) ethan-1-one (Compound of formula III)
Potassium carbonate (44.7g, 0.324mol), N-dimethylformamide (200ml) and dibromomethane (24.3g, 0.14mol) were added to a reaction flask, and a solution of 2, 3-dihydroxy-4-bromoacetophenone (25g, 0.108mol) in N, N-dimethylformamide (50ml) was slowly added dropwise thereto, after which the temperature was raised to an internal temperature of 100 ℃ for reaction for 5 hours. Cooled to room temperature, adjusted to pH 4 with 2N hydrochloric acid, extracted with ethyl acetate (100 ml. times.3), dried over anhydrous sodium sulfate and concentrated in the dry crude. Adding 200ml of n-heptane, heating and refluxing for 1h, cooling to room temperature, stirring for 2h, filtering, and drying to obtain 21.2g of piperonyl derivative 7-bromobenzo [ D ] [1,3] dioxol-4-ethanone, wherein the yield of the step is 80.7%, and the purity is 99.3%.
The experimental results are as follows:1H-NMR(400MHz,DMSO-d6):δ7.21(d,1H),7.16(d,1H),6.29(s,2H),2.51(s,3H)。
LCMS:m/z 244.1(M+H+)。
EXAMPLE 6 Synthesis of the Piperazino derivative 1- (7-bromobenzo [ d ] [1,3] dioxol-4-yl) ethan-1-one (Compound of formula III)
Sodium hydroxide (10.8g, 0.27mol), N-methylpyrrolidone (200ml) and dibromomethane (24.3g, 0.14mol) were added to a reaction flask, and a solution of 2, 3-dihydroxy-4-bromoacetophenone (25g, 0.108mol) in N-methylpyrrolidone (50ml) was slowly added dropwise thereto, after which the temperature was raised to an internal temperature of 120 ℃ for reaction for 4 hours. Cooled to room temperature, adjusted to pH 4 with 2N hydrochloric acid, extracted with ethyl acetate (100 ml. times.3), dried over anhydrous sodium sulfate and concentrated in the dry crude. Adding 200ml of n-heptane, heating and refluxing for 1h, cooling to room temperature, stirring for 2h, filtering, and drying to obtain 20.8g of piperonyl derivative 7-bromobenzo [ D ] [1,3] dioxol-4-ethanone, wherein the yield of the step is 79.2%. The purity is 99.1%.
The experimental results are as follows:1H-NMR(400MHz,DMSO-d6):δ7.21(d,1H),7.16(d,1H),6.29(s,2H),2.51(s,3H)。
LCMS:m/z 244.1(M+H+)。
according to the calculation of the result, the total yield of the synthesized product piperonyl derivative 1- (7-bromobenzo [ d ] [1,3] dioxol-4-yl) ethan-1-one can reach 51.7% -58.8%, and the purity of the final product is higher than 99%.
In conclusion, the synthesis method of the piperonyl cycloderivatives provided by the invention has the advantages of high yield, high purity, short synthesis steps, conventional and easily available starting materials, low cost and environmental friendliness, and has a good industrial application prospect.

Claims (10)

1. A synthesis method of piperonyl derivatives is characterized by comprising the following steps:
(1) carrying out substitution reaction on the compound shown in the formula I and bromine under the action of alkali to obtain a compound shown in a formula II;
(2) reacting the compound shown in the formula II obtained in the step (1) with dihalomethane under the action of inorganic base to obtain a piperonyl-cyclo derivative shown in the formula III;
the reaction route is as follows:
Figure FDA0002771264860000011
wherein R is C1~5Alkyl, preferably R is methyl.
2. The method of claim 1, wherein the base of step (1) is selected from tert-butylamine, diisopropylethylamine, triethylamine, N-methylmorpholine, triethylenediamine, or tetramethylethylenediamine; or, the inorganic base in the step (2) is selected from sodium carbonate, potassium carbonate, cesium carbonate, sodium hydroxide or potassium hydroxide, and the dihalomethane is selected from dichloromethane, dibromomethane or diiodomethane.
3. The synthesis method of claim 1, wherein the molar ratio of the compound represented by formula I in step (1) to the bromine and the base is 1 (1-2) to (2-5); the reaction conditions are as follows: reacting for 1-3 hours at-10 to-50 ℃ in an organic solvent; preferably, the organic solvent is selected from toluene, xylene, dichloromethane, chloroform, carbon tetrachloride, dichloroethane.
4. The synthesis method according to claim 3, wherein the step (1) further comprises the following post-treatment steps: heating to room temperature, filtering to obtain a filter cake, adding a purifying agent A, heating for refluxing, cooling to room temperature, stirring, filtering to obtain a filter cake, washing with the purifying agent A again, and drying; the purifying agent A is selected from petroleum ether, n-hexane, toluene and dichloromethane, and is preferably petroleum ether.
5. The synthesis method of claim 1, wherein the molar ratio of the compound of formula II in the step (2) to the dihalomethane and the inorganic base is 1 (1-2) to (2-5); the reaction conditions are as follows: reacting in an organic solvent at 70-160 ℃ for 4-5 hours; preferably, the organic solvent is selected from the group consisting of N, N-dimethylformamide, dimethyl sulfoxide, N-methylpyrrolidone, dioxane, acetonitrile.
6. The synthesis method according to claim 5, wherein the step (2) further comprises the following post-treatment steps: cooling to room temperature, adjusting pH to acidity, extracting, drying, concentrating, adding a purifying agent B, heating and refluxing, cooling to room temperature, stirring, filtering to obtain a filter cake, and drying; the purifying agent B is selected from n-heptane, n-hexane, petroleum ether, toluene and dichloromethane, and is preferably n-heptane.
7. The process of claim 1, wherein the compound of formula I is obtained by reacting catechol with an acylating agent under the action of a lewis acid.
8. The synthesis method of claim 7, wherein the molar ratio of catechol to the acylating agent and the Lewis acid is 1 (1-2) to (2-5), and the reaction conditions are as follows: reacting in an organic solvent or without adding a solvent, wherein the reaction temperature range is as follows: the reaction time is 3-4 hours from room temperature to the reflux temperature of the organic solvent; preferably, the organic solvent is selected from dichloromethane, dichloroethane, nitromethane, nitrobenzene, carbon disulfide.
9. The method of synthesis of claim 8, further comprising the post-processing steps of: quenching reaction at room temperature, extracting, separating, collecting organic phase, concentrating, adding purifying agent C, stirring at room temperature, pulping, filtering, and oven drying filter cake; the purifying agent C is selected from n-heptane, n-hexane, petroleum ether, toluene and dichloromethane, and is preferably n-heptane.
10. The method of synthesis of claim 9, wherein the quenching reaction is carried out by adding water or hydrochloric acid.
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CN113480512A (en) * 2021-07-23 2021-10-08 阜阳欣奕华制药科技有限公司 Preparation method of 1- (7-bromobenzo [ D ] [1,3] dioxol-4-yl) ethyl-1-ketone
CN113603670A (en) * 2021-07-23 2021-11-05 阜阳欣奕华制药科技有限公司 Method for preparing 1- (7-bromobenzo [ D ] [1,3] dioxol-4-yl) ethyl-1-one
CN114773309A (en) * 2022-04-12 2022-07-22 乐威医药(天津)有限公司 Preparation method and application of 1- (7-halobenzo [ D ] [1,3] dioxol-4-yl) alkyl ketone compound

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CN113480512A (en) * 2021-07-23 2021-10-08 阜阳欣奕华制药科技有限公司 Preparation method of 1- (7-bromobenzo [ D ] [1,3] dioxol-4-yl) ethyl-1-ketone
CN113603670A (en) * 2021-07-23 2021-11-05 阜阳欣奕华制药科技有限公司 Method for preparing 1- (7-bromobenzo [ D ] [1,3] dioxol-4-yl) ethyl-1-one
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CN113603670B (en) * 2021-07-23 2022-07-29 阜阳欣奕华制药科技有限公司 Method for preparing 1- (7-bromobenzo [ D ] [1,3] dioxol-4-yl) ethyl-1-one
CN114773309A (en) * 2022-04-12 2022-07-22 乐威医药(天津)有限公司 Preparation method and application of 1- (7-halobenzo [ D ] [1,3] dioxol-4-yl) alkyl ketone compound

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