CN109912566A - The synthesis of the novel fluorescence parent nucleus of one kind ring containing quinoline - Google Patents

The synthesis of the novel fluorescence parent nucleus of one kind ring containing quinoline Download PDF

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CN109912566A
CN109912566A CN201711370139.5A CN201711370139A CN109912566A CN 109912566 A CN109912566 A CN 109912566A CN 201711370139 A CN201711370139 A CN 201711370139A CN 109912566 A CN109912566 A CN 109912566A
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compound
added
ring containing
reaction
parent nucleus
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朱海亮
邵晨雯
陈健
张萌
杨蓉
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Nanjing University
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Nanjing University
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Abstract

The fluorescence parent nucleus of one kind ring containing quinoline, it has structure shown in following general formula I.The invention discloses the synthetic method of the fluorescence parent nucleus of a kind of novel ring containing quinoline and its applications in fluorescence probe design.

Description

The synthesis of the novel fluorescence parent nucleus of one kind ring containing quinoline
Technical field
The invention belongs to biochemical field, more particularly to a kind of ring containing quinoline fluorescence parent nucleus synthesis and its in fluorescence Application in probe design synthesis.
Background technique
Due to the needs of biology and clinic study, the exploitation of small-molecule fluorescent probe increasingly becomes the heat of research Point.Fluorescence probe because have simple operations, high sensitivity and it is highly selective and be applied to detection metal ion and Other small molecules.
Fluorescence probe is mainly made of recognition group, connector and fluorescence parent nucleus.Existing fluorescence probe exists glimmering mostly Luminous intensity is weaker, excitation wavelength is smaller, light resistance is poor, the disadvantages of being difficult to apply in biological tissue.Therefore, it rationally designs, sieve Select a kind of novel fluorogen for small-molecule fluorescent probe should being used to say that for biology, clinical medicine and Other subjects must It wants.
Influence many because being known as of fluorescence probe intensity, such as suction, the electron supplying capacity of pH, concentration, substituent group.In phase Under same environment, the present invention is transformed designed fluorescence parent nucleus by connecting different substituent groups, therefrom screens optimal Structure provides theoretical foundation for the synthesis of subsequent probes.
Summary of the invention
The present invention relates to the synthesis of the fluorescence parent nucleus of one kind ring containing quinoline and the application in fluorescence probe design synthesis.
Technical scheme is as follows:
The derivative of one kind ring containing quinoline, chemical structural formula are as follows:
Wherein, R is selected from:
The synthetic method of the derivative of one kind ring containing quinoline, it is characterized in that it is made of the following steps:
Step 1 Weigh Compound II (5000mg, 29.07mmol) is added in 500mL round-bottomed flask, 6M hydrochloric acid (300mL) Compound II is dissolved, 1h is stirred at room temperature, crotonaldehyde (7.2mL, 87.20mmol, 3eq) is added into bottle in 100 DEG C of oil baths It is heated to reflux 2h, the reaction of TLC tracing detection is until compound II fully reacting.With the NaOH solution of saturation adjust reaction solution PH to Neutrality, ethyl acetate extract three times, take organic phase, and anhydrous sodium sulfate is dry, and organic phase liquid is steamed using vacuum rotary evaporator It is dry, using 200-300 mesh silica gel column chromatography separating purification crude product, finally obtain the solid of shape containing pale yellow powder i.e. compound III (3685mg, yield 73.7%).
Step 2 weighs SeO2(400mg, 3.6mmol) is added in 100mL round-bottomed flask, with dioxanes: water (25mL: It 2.5mL) is dissolved, 80 DEG C of stirring 30min, is added compound III (500mg, 2.25mmol), 80 DEG C of stirring 4h, TLC tracking Detection reaction is until raw material, that is, compound III fully reacting.It is cooled to room temperature, diatomite filtering, methylene chloride repeatedly drenches on a small quantity It washes, filtrate is evaporated with vacuum rotary evaporator, using 200-300 mesh silica gel column chromatography separating purification crude product, finally obtain Yellow pellet-like solids, that is, compound IV (378mg, 75.6%).
Step 3 Weigh Compound IV (165mg, 0.699mmol) is added in 50mL round-bottomed flask, and 10mL toluene is by chemical combination Object C dissolution, weighs palladium acetate (9.4mg, 0.042mmol, 0.06eq), cesium carbonate (273mg, 0.84mmol, 1.2eq), BINAP (26.12mg, 0.042mmol, 0.06eq), different azacyclo-s are proportionally added into reaction solution, are heated to reflux 8h, TLC in 100 DEG C Tracing detection reaction, entire reaction process are protected with argon gas.Reaction solution is used into suction filtered through kieselguhr, retains filtrate and is revolved again with vacuum Turn evaporimeter to be evaporated, using 200-300 mesh silica gel column chromatography separating purification crude product, finally obtaining one kind has green glimmering to yellow The faint yellow solid of light, i.e., the derivative of a kind of ring containing quinoline.
A kind of derivative containing quinoline that the present invention designs synthesis has stronger fluorescence, is being designed synthesized micromolecule Fluorescence probe direction has very big potentiality.
Specific embodiment
The preparation of embodiment one: 6- (azetidine -1- base) quinoline -2- formaldehyde
Weigh Compound II (5000mg, 29.07mmol) is added in 500mL round-bottomed flask, and 6M hydrochloric acid (300mL) is by chemical combination Object II dissolution, is stirred at room temperature 1h, and crotonaldehyde (7.2mL, 87.20mmol, 3eq) is added into bottle and heats back in 100 DEG C of oil baths 2h is flowed, the reaction of TLC tracing detection is until compound II fully reacting.Reaction solution PH is adjusted to neutrality with the NaOH solution of saturation, Ethyl acetate extracts three times, takes organic phase, and anhydrous sodium sulfate is dry, and organic phase liquid is evaporated using vacuum rotary evaporator, is made With 200-300 mesh silica gel column chromatography separating purification crude product, the solid of shape containing pale yellow powder i.e. compound III is finally obtained (3685mg, yield 73.7%).
Weigh SeO2(400mg, 3.6mmol) is added in 100mL round-bottomed flask, will with dioxanes: water (25mL: 2.5mL) It is dissolved, 80 DEG C of stirring 30min, is added compound III (500mg, 2.25mmol), 80 DEG C of stirring 4h, the reaction of TLC tracing detection Until raw material, that is, compound III fully reacting.It is cooled to room temperature, diatomite filtering, methylene chloride repeatedly elutes on a small quantity, by filtrate It is evaporated with vacuum rotary evaporator, using 200-300 mesh silica gel column chromatography separating purification crude product, it is solid to finally obtain yellow sheet Body, that is, compound IV (378mg, 75.6%).
Weigh Compound IV (165mg, 0.699mmol) is added in 50mL round-bottomed flask, and 10mL toluene is molten by compound C Solution, weighs palladium acetate (9.4mg, 0.042mmol, 0.06eq), cesium carbonate (273mg, 0.84mmol, 1.2eq), BINAP (26.12mg, 0.042mmol, 0.06eq), azetidine (47.85 μ L, 0.961mmol, 1.375eq) are proportionally added into instead It answers in liquid, 8h, the reaction of TLC tracing detection is heated to reflux in 100 DEG C, entire reaction process is protected with argon gas.Reaction solution is used Suction filtered through kieselguhr is retained filtrate and is evaporated again with vacuum rotary evaporator, slightly produced using 200-300 mesh silica gel column chromatography separating purification Object finally obtains the yellow solid of the fluorescence containing glassy yellow, i.e. 6- (azetidine -1- base) quinoline -2- formaldehyde (20.68mg). Yield: 13.60%.1H NMR (600MHz, DMSO-d6) δ 9.99 (d, J=0.8Hz, 1H), 8.18 (d, J=8.5Hz, 1H), 7.99 (d, J=9.1Hz, 1H), 7.81 (d, J=8.5Hz, 1H), 7.16 (dd, J=9.1,2.6Hz, 1H), 6.69 (d, J= 2.5Hz, 1H), 4.04 (t, J=7.3Hz, 4H), 2.43-2.38 (m, 2H)
The preparation of embodiment two: 6- (pyrrolidin-1-yl) quinoline -2- formaldehyde
Preparation method reference implementation example one.Obtain yellow powder, yield: 28.19%.1H NMR (600MHz, DMSO-d6) δ 9.97 (s, 1H), 8.16 (d, J=8.5Hz, 1H), 7.99 (d, J=9.2Hz, 1H), 7.79 (d, J=8.5Hz, 1H), 7.40 (dd, J=9.3,2.7Hz, 1H), 6.82 (d, J=2.7Hz, 1H), 3.45-3.42 (m, 4H), 2.05-2.01 (m, 4H)
The preparation of embodiment three: 6- (piperidin-1-yl) quinoline -2- formaldehyde
Preparation method reference implementation example one.Obtain yellow powder, yield: 35.61%.1H NMR (600MHz, DMSO-d6) δ 10.01 (s, 1H), 8.23 (d, J=8.5Hz, 1H), 7.98 (d, J=9.4Hz, 1H), 7.83 (d, J=8.5Hz, 1H), 7.73 (dd, J=9.4,2.8Hz, 1H), 7.24 (d, J=2.8Hz, 1H), 3.44 (t, J=5.0Hz, 4H), 1.67-1.60 (m, J= 4.8Hz, 6H)
Example IV: the preparation of 6- (azepan -1- base) quinoline -2- formaldehyde
Preparation method reference implementation example one.Obtain pale yellow powder, yield: 23.65%.1H NMR (600MHz, DMSO-d6) δ 9.97 (s, 1H), 8.15 (d, J=8.6Hz, 1H), 7.97 (d, J=9.4Hz, 1H), 7.78 (d, J=8.5Hz, 1H), 7.55 (dd, J=9.5,2.9Hz, 1H), 7.01 (d, J=2.9Hz, 1H), 3.65 (t, J=6.1Hz, 4H), 1.83-1.78 (m, 4H), 1.49 (p, J=2.7Hz, 4H)
The preparation of embodiment five: 6- (morpholine -1- base) quinoline -2- formaldehyde
Preparation method reference implementation example one.Obtain yellow powder, yield: 25.78%.1H NMR (600MHz, DMSO-d6) δ 10.03 (d, J=0.8Hz, 1H), 8.30-8.28 (m, 1H), 8.05-8.03 (m, 1H), 7.87 (d, J=8.5Hz, 1H), 7.78 (dd, J=9.4,2.8Hz, 1H), 7.30 (d, J=2.8Hz, 1H), 3.81-3.79 (m, 4H), 3.40-3.37 (m, 4H)
The preparation of embodiment six: 6- (piperidinyl piperidine -1- base) quinoline -2- formaldehyde
Preparation method reference implementation example one.Yellow powder is obtained, yield: 16.27%.1H NMR (600MHz, Chloroform-d) δ 10.05 (s, 1H), 7.96 (dd, J=12.3,8.9Hz, 2H), 7.83 (dd, J=8.4,1.6Hz, 1H), 7.47 (dd, J=9.4,2.7Hz, 1H), 6.93 (d, J=2.6Hz, 1H), 3.94 (d, J=12.7Hz, 2H), 2.89-2.82 (m, 2H), 2.64 (s, 5H), 2.03 (d, J=12.0Hz, 2H), 1.70 (d, J=27.4Hz, 6H), 1.43 (s, 2H)

Claims (4)

1. the fluorescence parent nucleus of a kind of ring containing quinoline, it is characterised in that have structure shown in general formula I:
Wherein, R is selected from:
2. the preparation method of the novel fluorescence parent nucleus of one kind ring containing quinoline described in claim 1, it is characterized in that it is by following step Rapid composition:
Step 1 Weigh Compound II (5000mg, 29.07mmol) is added in 500mL round-bottomed flask, and 6M hydrochloric acid (300mL) will be changed Object II dissolution is closed, 1h is stirred at room temperature, crotonaldehyde (7.2mL, 87.20mmol, 3eq) is added into bottle and is heated in 100 DEG C of oil baths Flow back 2h, and the reaction of TLC tracing detection is until compound II fully reacting.Reaction solution PH is adjusted into the NaOH solution of saturation Property, ethyl acetate extracts three times, takes organic phase, and anhydrous sodium sulfate is dry, organic phase liquid is evaporated using vacuum rotary evaporator, Using 200-300 mesh silica gel column chromatography separating purification crude product, the solid of shape containing pale yellow powder i.e. compound III is finally obtained (3685mg, yield 73.7%).
Step 2 weighs SeO2(400mg, 3.6mmol) is added in 100mL round-bottomed flask, will with dioxanes: water (25mL: 2.5mL) It is dissolved, 80 DEG C of stirring 30min, is added compound III (500mg, 2.25mmol), 80 DEG C of stirring 4h, the reaction of TLC tracing detection Until raw material, that is, compound III fully reacting.It is cooled to room temperature, diatomite filtering, methylene chloride repeatedly elutes on a small quantity, by filtrate It is evaporated with vacuum rotary evaporator, using 200-300 mesh silica gel column chromatography separating purification crude product, it is solid to finally obtain yellow sheet Body, that is, compound IV (378mg, 75.6%).
Step 3 Weigh Compound IV (165mg, 0.699mmol) is added in 50mL round-bottomed flask, and 10mL toluene is molten by compound C Solution, weighs palladium acetate (9.4mg, 0.042mmol, 0.06eq), cesium carbonate (273mg, 0.84mmol, 1.2eq), BINAP (26.12mg, 0.042mmol, 0.06eq), different azacyclo-s are proportionally added into reaction solution, are heated to reflux 8h, TLC in 100 DEG C Tracing detection reaction, entire reaction process are protected with argon gas.Reaction solution is used into suction filtered through kieselguhr, retains filtrate and is revolved again with vacuum Turn evaporimeter to be evaporated, using 200-300 mesh silica gel column chromatography separating purification crude product, finally obtaining one kind has green glimmering to yellow The faint yellow solid of light, i.e., the derivative of a kind of ring containing quinoline.
It is using 200-300 mesh silicagel column, eluant, eluent 3. synthetic method according to claim 2 chromatographs described in step For a certain proportion of anhydrous ethyl acetate and petroleum ether.
4. the synthetic method of the novel fluorescence parent nucleus of one kind ring containing quinoline described in claim 1 is closed with the design in fluorescence probe Application in.
CN201711370139.5A 2017-12-12 2017-12-12 The synthesis of the novel fluorescence parent nucleus of one kind ring containing quinoline Pending CN109912566A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113880821A (en) * 2021-10-29 2022-01-04 南京碳硅人工智能生物医药技术研究院有限公司 Design and synthesis method of fluorescent probe for imaging epileptic intracerebral hypochlorous acid characteristics by two-photon fluorescent probe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007055956A (en) * 2005-08-26 2007-03-08 Tokyo Univ Of Pharmacy & Life Science New quinoline compound as fluorescent labeling reagent and hydrophobic site-detecting reagent
EP3239143A2 (en) * 2014-12-24 2017-11-01 LG Chem, Ltd. Biaryl derivative as gpr120 agonist
CN107417609A (en) * 2017-06-23 2017-12-01 南京大学 The synthesis of the fluorescence parent nucleus of a kind of new ring containing quinoline

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007055956A (en) * 2005-08-26 2007-03-08 Tokyo Univ Of Pharmacy & Life Science New quinoline compound as fluorescent labeling reagent and hydrophobic site-detecting reagent
EP3239143A2 (en) * 2014-12-24 2017-11-01 LG Chem, Ltd. Biaryl derivative as gpr120 agonist
CN107417609A (en) * 2017-06-23 2017-12-01 南京大学 The synthesis of the fluorescence parent nucleus of a kind of new ring containing quinoline

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113880821A (en) * 2021-10-29 2022-01-04 南京碳硅人工智能生物医药技术研究院有限公司 Design and synthesis method of fluorescent probe for imaging epileptic intracerebral hypochlorous acid characteristics by two-photon fluorescent probe
CN113880821B (en) * 2021-10-29 2024-03-12 南京碳硅人工智能生物医药技术研究院有限公司 Fluorescent probe design for epileptic intracerebral hypochlorous acid characteristic imaging by two-photon fluorescent probe and synthetic method thereof

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Application publication date: 20190621