CN107628979A - Method for synthesizing 2H-azacyclo acrylamide - Google Patents

Method for synthesizing 2H-azacyclo acrylamide Download PDF

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CN107628979A
CN107628979A CN201711024172.2A CN201711024172A CN107628979A CN 107628979 A CN107628979 A CN 107628979A CN 201711024172 A CN201711024172 A CN 201711024172A CN 107628979 A CN107628979 A CN 107628979A
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amido
isoxazoles
phenyl
synthesis
acid amides
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CN107628979B (en
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姜耀甲
戈云
裴冰冰
丁佳
罗德平
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Nanjing Tech University
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Nanjing Tech University
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Abstract

The invention relates to a method for synthesizing 2H-azacyclo-acrylamide, which comprises the steps of adding 5-aminoisoxazole raw materials into a reaction solvent, adding a Holovad-Glabra catalyst, carrying out catalytic reaction under green light illumination, removing the reaction solvent from the obtained reaction liquid, and then purifying to obtain the product. The synthesis method of the invention has the advantages of very mild and green conditions, high yield and wide applicable substrate range, for example, 2-bit of the three-membered ring of the 2H-azaenamide can be various substituted phenyl, heterocyclic ring, olefin and alkane, 3-bit can be methyl, allyl, phenyl and 1-phenylallyl, and the amide can be substituted by aromatic hydrocarbon substituted amine, alkane and acyl.

Description

A kind of method of synthesis 2H- aziridine acid amides
Technical field
The present invention relates to a kind of method of synthesis 2H- aziridine amide derivatives, belong to methodology of organic synthesis skill Art field.
Background technology
2H- aziridine structures in 2H- aziridine amide derivatives are present in many natural products, are very The common skeleton of more raw natural products medicines.Such as:
2H- aziridines have highly reactive compound as one kind, in many natural products and medicine There is its structure.In organic synthesis, 2H- aziridines can be used as reaction intermediate, reacting precursor can also be used as to close Into various useful heterocyclic compounds, such as pyridines, furans, pyroles, Benzazole compounds.Synthesis 2H- azepines at present Cyclopropylene acid amides mainly has three methods, ultraviolet lighting, high-temperature heating, frerrous chloride catalysis isoxazole contracting ring.Use ultraviolet lighting Method synthesizes 2H- aziridines, and yield is very low, and substrate spectrum applicatory is small;With high-temperature heating method synthesis 2H- azacyclo-s third Alkene is, it is necessary to higher temperature, and generally at 100 DEG C -300 DEG C, substrate spectrum applicatory is small;Contracted with frerrous chloride catalysis isoxazole Cyclization is into 2H- aziridines, although yield is higher, substrate spectrum very little applicatory.
The content of the invention
A kind of purpose of synthesis of the present invention is that solve the deficiencies in the prior art, there is provided one kind synthesis 2H- aziridine acyls The method of amine, this method mild condition, suitable substrates scope is wide, and high income.
Technical scheme
A kind of method of synthesis 2H- aziridine acid amides:5- amido isoxazole raw materials are added in reaction dissolvent, then Lotus Victor-Ge Labu catalyst is added, catalytic reaction is carried out in green glow illumination, obtained reaction solution is removed after reaction dissolvent again Purified, produced.
Further, it is different to be selected from the iso- 5- amino oxazole of 3- octyl groups, 3- cyclohexyl -5- amino for the 5- amido isoxazoles raw material Dislike
Azoles, 3- phenylpropyl -5- amido isoxazoles, 3- cinnamyl -5- amido isoxazoles, 3- phenyl -5- amido isoxazoles, 3- (4- chlorphenyls) -5- amido isoxazoles, 3- (4- bromophenyls) -5- amido isoxazoles, 3- (2- naphthyls) -5- amido isoxazoles, 3- (2- furyls) -5- amido isoxazoles, 3- phenyl -4- pi-allyl -5- amido isoxazoles, 3- phenyl -4- (1- phenyl allyls) - It is any in 5- amido isoxazoles, 3- phenyl -5- (N- benzylaminos) isoxazoles or 3- phenyl -5- (N- octyl aminos) isoxazole It is a kind of.
Further, the reaction dissolvent is selected from absolute ethyl alcohol, acetonitrile, 1,2- dichloroethanes, dichloromethane, toluene or isopropyl Any one in alcohol.Preferably absolute ethyl alcohol.
Further, the lotus Victor-Ge Labu catalyst is dichloro (adjacent isopropoxy benzene methylene) (thricyclohexyl Phosphine) ruthenium or dichloro [double (2- the aminomethyl phenyls) -2- imidazolidines subunits of 1,3-] (2- isopropoxies benzylidene) ruthenium.
Further, the catalytic reaction is carried out under 36w green light lamps, a length of 24-72h during reaction.
Further, the method for removing reaction dissolvent is to use vacuum rotary evaporator.
Further, using column chromatography, solvent is dichloromethane/ethyl acetate=4 for the purifying:1.
The beneficial effects of the invention are as follows:Condition required for the synthetic method of the present invention is very gentle, green, and yield Height, applicable substrate spectrum is extensive, as 2 of the three-membered ring of 2H- azepine acrylamides can be various substituted-phenyls, heterocycle, alkene Hydrocarbon, alkane, 3 can be methyl, pi-allyl, phenyl, 1- phenyl allyls, and acid amides can substitute amine, alkane substitution, acyl with aromatic hydrocarbons Base substitutes.
Brief description of the drawings
Fig. 1 is the proton nmr spectra of 3- cyclohexyl -5- amido isoxazoles;
Fig. 2 is the carbon-13 nmr spectra of 3- cyclohexyl -5- amido isoxazoles;
Fig. 3 is the proton nmr spectra of 2- cyclohexyl -2H- aziridine acid amides made from embodiment 1;
Fig. 4 is the carbon-13 nmr spectra of 2- cyclohexyl -2H- aziridine acid amides made from embodiment 1.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
Embodiment 1
The first step, synthesis material 3- cyclohexyl -5- amido isoxazoles:
Sodium acetate (2mmol) and hydroxylamine hydrochloride (2mmol) are added in 10ml reaction tubes, 1ml methanol is added, stirs
A hour is mixed, then adds methanol (1ml) solution of cyclohexyl formoxyl acetonitrile (1mmol), stirs 12-24h. After TLC monitoring reactions completely, reaction solution is transferred in 100ml round-bottomed flasks, methanol is removed with vacuum rotary evaporator, adds Water 20ml, it is extracted with ethyl acetate three times, use ethyl acetate 10ml every time, merging organic layer, with 20ml saturated common salt water washings, Organic layer anhydrous sodium sulfate drying, ethyl acetate, column chromatography separation product, solvent pole are removed with vacuum rotary evaporator Property petrol ether/ethyl acetate=4:1, product is faint yellow solid, yield 80%.
The proton nmr spectra of 3- cyclohexyl -5- amido isoxazoles is shown in Fig. 1, the nuclear-magnetism of 3- cyclohexyl -5- amido isoxazoles Resonance carbon spectrum is shown in Fig. 2.
Second step, synthesize 2- cyclohexyl -2H- aziridine acid amides:
3- cyclohexyl -5- amido isoxazoles (1mmol) are added in 10ml reaction tubes, add absolute ethyl alcohol 2ml, add two Chlorine [1,3- double (2- aminomethyl phenyls) -2- imidazolidines subunits] (2- isopropoxies benzylidene) ruthenium (1mol%), with 36W green light lamps Irradiation 48 hours, after TLC monitoring reactions completely, reaction solution is transferred in 100ml round-bottomed flasks, removed with vacuum rotary evaporator Ethanol, column chromatography separation product are removed, solvent is dichloromethane/ethyl acetate=4:1, product is white solid, yield 95%.
The proton nmr spectra of obtained product 2- cyclohexyl -2H- aziridine acid amides is shown in Fig. 3,2- cyclohexyl -2H- The carbon-13 nmr spectra of aziridine acid amides is shown in Fig. 4.
Embodiment 2
3- phenylpropyl -5- amido isoxazoles (1mmol) are added in 10ml reaction tubes, add absolute ethyl alcohol 2ml, add two Chlorine (adjacent isopropoxy benzene methylene) (tricyclohexyl phosphine) ruthenium (1mol%), with 36W green glows light irradiation 36 hours, TLC monitorings After reaction completely, reaction solution is transferred in 100ml round-bottomed flasks, ethanol, column chromatography point are removed with vacuum rotary evaporator From product, solvent is dichloromethane/ethyl acetate=4:1, product is white solid, yield 89%.
Embodiment 3
3- (4- chlorphenyls) isoxazole (1mmol) is added in 10ml reaction tubes, adds absolute ethyl alcohol 2ml, adds dichloro [1,3- double (2- aminomethyl phenyls) -2- imidazolidines subunits] (2- isopropoxies benzylidene) ruthenium (1mol%), is shone with 36W green light lamps Penetrate 32 hours, after TLC monitoring reactions completely, reaction solution is transferred in 100ml round-bottomed flasks, removed with vacuum rotary evaporator Ethanol, column chromatography separation product, solvent are dichloromethane/ethyl acetate=4:1, product is white solid, yield 92%.
Embodiment 4
3- phenyl -4- pi-allyl -5- amido isoxazoles (1mmol) are added in 10ml reaction tubes, add dichloromethane 2ml, dichloro [1,3- double (2- aminomethyl phenyls) -2- imidazolidines subunits] (2- isopropoxies benzylidene) ruthenium (1mol%) is added, With 36W green glows light irradiation 40 hours, after TLC monitoring reactions completely, reaction solution is transferred in 100ml round-bottomed flasks, uses vacuum Rotary evaporator removes ethanol, and column chromatography separation product, solvent is dichloromethane/ethyl acetate=4:1, product is white Solid, yield 87%.
Embodiment 5
3- phenyl -5- (N- benzylaminos) isoxazole (1mmol) is added in 10ml reaction tubes, adds absolute ethyl alcohol 2ml, Dichloro [1,3- double (2- aminomethyl phenyls) -2- imidazolidines subunits] (2- isopropoxies benzylidene) ruthenium (1mol%) is added, uses 36W Green glow light irradiation 30 hours, after TLC monitoring reactions completely, reaction solution is transferred in 100ml round-bottomed flasks, steamed with vacuum rotating Send out device and remove ethanol, column chromatography separation product, solvent is dichloromethane/ethyl acetate=4:1, product is white solid, Yield 90%.

Claims (7)

  1. A kind of 1. method of synthesis 2H- aziridine acid amides, it is characterised in that 5- amido isoxazole raw materials are added to reaction In solvent, lotus Victor-Ge Labu catalyst is added, catalytic reaction is carried out in green glow illumination, obtained reaction solution is removed anti- Purified, produced again after answering solvent.
  2. 2. the method for synthesis 2H- aziridine acid amides as claimed in claim 1, it is characterised in that the different evil of 5- amino Azoles raw material is selected from the iso- 5- amino oxazole of 3- octyl groups, 3- cyclohexyl -5- amido isoxazoles, 3- phenylpropyl -5- amido isoxazoles, 3- Cinnamyl -5- amido isoxazoles, 3- phenyl -5- amido isoxazoles, 3- (4- chlorphenyls) -5- amido isoxazoles, 3- (4- bromobenzenes Base) -5- amido isoxazoles, 3- (2- naphthyls) -5- amido isoxazoles, 3- (2- furyls) -5- amido isoxazoles, 3- phenyl -4- Pi-allyl -5- amido isoxazoles, 3- phenyl -4- (1- phenyl allyls) -5- amido isoxazoles, 3- phenyl -5- (N- benzyl ammonia Base) any one in isoxazole or 3- phenyl -5- (N- octyl aminos) isoxazole.
  3. 3. the method for synthesis 2H- aziridine acid amides as claimed in claim 1, it is characterised in that the reaction dissolvent choosing From any one in absolute ethyl alcohol, acetonitrile, 1,2- dichloroethanes, dichloromethane, toluene or isopropanol.Preferably anhydrous second Alcohol.
  4. 4. the method for synthesis 2H- aziridine acid amides as claimed in claim 1, it is characterised in that the lotus Victor-Ge La Cloth catalyst be dichloro (adjacent isopropoxy benzene methylene) (tricyclohexyl phosphine) ruthenium or dichloro [1,3- double (2- aminomethyl phenyls)- 2- imidazolidines subunit] (2- isopropoxies benzylidene) ruthenium.
  5. 5. the method for synthesis 2H- aziridine acid amides as claimed in claim 1, it is characterised in that the catalytic reaction is Carried out under 36w green light lamps, a length of 24-72h during reaction.
  6. 6. the method for synthesis 2H- aziridine acid amides as claimed in claim 1, it is characterised in that described except dereaction is molten The method of agent is to use vacuum rotary evaporator.
  7. 7. the method for the synthesis 2H- aziridine acid amides as described in any one of claim 1 to 6, it is characterised in that described pure Change using column chromatography, solvent is dichloromethane/ethyl acetate=4:1.
CN201711024172.2A 2017-10-27 2017-10-27 Method for synthesizing 2H-azacyclo acrylamide Active CN107628979B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108689901A (en) * 2018-05-05 2018-10-23 西北大学 A kind of synthetic method of aziridine class compound

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EDWIN F.ULLMAN,ET AL.: "Photochemical Transposition of Ring Atoms in Five-Membered Heterocycles. The Photorearrangement of 3,5-Diphenylisoxazole", 《JOURNAL OF THE AMERICAN CHEMICAL SOCIETY》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108689901A (en) * 2018-05-05 2018-10-23 西北大学 A kind of synthetic method of aziridine class compound
CN108689901B (en) * 2018-05-05 2020-04-28 西北大学 Synthetic method of aziridine compound

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