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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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Hwang, Dong-Jin ; Yang, Chuanhe ; Wang, Yinan ; Kelso, Hannah ; Pochampally, Satyanarayana ; Pfeffer, Lawrence M , et al.
Abstract: Background/Objectives: Human glioblastoma (GBM) is the most aggressive brain cancer in adults and a highly treatment-refractory malignancy. The overall prognosis for the GBM is extremely poor, with a median survival of 12–14 months after initial diagnosis. Many GBM patients initially respond to the DNA alkylating agent temozolomide (TMZ), but patients often become therapy-resistant, and tumors recur. We previously reported that treatment with PFI-3, which is a small molecule inhibitor of the bromodomain of the BRG1 subunit of the SW1/SNF chromatin remodeling complex, enhanced the sensitivity of GBM cells to TMZ in vitro and in vivo GBM animal models. Our general objective was to perform an SAR study of new diphenyl PFI-3 analogs. Methods: New structural analogs of PFI-3 were developed, synthesized, and tested for their ability to enhance TMZ-induced GBM cell death by ELISA. Results: Following on the enhanced activity of compounds 2a and 2b, new diphenyl PFI-3 analogs with specific structural adjustments were made to better understand the structural requirements to optimize function. Additionally, several new structurally different candidates (e.g., 4a, 4b, and 5) showed much better efficacy in sensitizing GBM cells to TMZ-induced GBM cell death. Conclusions: Four series of PFI-3 analogs (2, 3, 4, and 5) were designed, synthesized, and tested for the ability to sensitize GBM cells to TMZ-induced cell death. Series 2 optimized the A-ring and R-isomer chirality. Series 3 used a 5-membered linker with weak activity. Series 4’s di-phenyl urea compounds showed better bromodomain inhibition. Series 5’s methoxyphenyl-B-ring analogs were exceptionally strong inhibitors.
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Keywords: bromodomain ; glioblastoma (GBM) ; therapeutic enhancing drug (TED) ; anti-GBM activity ; structure-activity relationship (SAR) ; PFI-3 analog ; temozolomide (TMZ)
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CAS No. : | 3863-11-4 |
Formula : | C6H5F2N |
M.W : | 129.11 |
SMILES Code : | NC1=CC=C(F)C(F)=C1 |
MDL No. : | MFCD00007761 |
InChI Key : | AXNUZKSSQHTNPZ-UHFFFAOYSA-N |
Pubchem ID : | 77469 |
GHS Pictogram: |
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Signal Word: | Danger |
Hazard Statements: | H227-H302+H332-H311-H315-H319-H335-H373 |
Precautionary Statements: | P210-P261-P280-P305+P351+P338-P332+P313 |
Class: | 6.1 |
UN#: | 2941 |
Packing Group: | Ⅲ |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
97% | With iodine; sodium hydrogencarbonate In water at 20℃; for 0.5 h; | 3,4-Difluoroaniline (645mg, 5mmol) was suspended in water (25 mL). Sodium bicarbonate (630 mg, 7.5 mmol) was added and then iodine (1.65 g, 6.5 mmol). The reaction mixture was stirred vigorously at ambient temperature for 30min and then poured into saturated sodium thiosulphate solution (50 mL) and extracted with ethyl acetate (2x25 mL). The combined extracts were washed with sodium thiosulphate (20 mL), water (20 mL) and brine (20 mL), dried (MgSO4) and evaporated to give the title compound as a dark oil. (1.24g, 97percent). |
69% | With N-iodo-succinimide In dichloromethane at 20℃; Inert atmosphere | At room temperature, a solution of 3,4-difluoroaniline (100 μL, 1 mmol) and N-iodosuccinimide (225 mg, 1 mmol) in anhydrous dichloromethane (4 mL) was stirred overnight under argon atmosphere. Then an aqueous solution of sodium sulfite was added and the reaction mixture was extracted with dichloromethane. The combined organic extracts were dried over sodium sulfate, filtered and evaporated. The crude product was purified by flash chromatography (silica gel, cyclohexane/ethyl acetate, 1/0 to 8/2) to afford 4,5-difluoro-2-iodoaniline (175 mg, 69percent) as a red oil. ESI-MS m/z 255.9 (M+H)+. |
12 g | With iodine; sodium hydrogencarbonate In water at 20℃; for 1 h; | Reference Example 3a 2-methyl-5,6-fluoro-2,3-dihydro-1H-indole Step 1a:4,5-Difluoro-2-iodoaniline 16.5 g of iodine and 6.3 g of sodium bicarbonate are added, at ambient temperature, to a suspension of 6.45 g of 3,4-difluoroaniline in 250 ml of water. The reaction medium is stirred at ambient temperature for 1 hour.A saturated sodium thiosulfate solution is added and then the resulting mixture is extracted 3 times with ethyl acetate. The organic phases are combined, dried over magnesium sulfate, filtered, and then concentrated under reduced pressure, so as to give 12 g of 4,5-difluoro-2-iodoainiline, the characteristics of which are the following:Mass spectrometry: method ARetention time Tr (min)=0.90; [M+H]+: m/z 256; base peak: m/z 297 |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With thionyl chloride; In isopropyl alcohol; | The 4-(3',4'-difluoroanilino)-6-hydroxy-7-methoxyquinazoline used as a starting material was obtained as follows: A mixture of 6-acetoxy-4-chloro-7-methoxyquinazoline hydrochloride ›obtained from <strong>[179688-53-0]6-acetoxy-7-methoxy-3,4-dihydroquinazolin-4-one</strong> (6 g) and thionyl chloride (87[ml)], 3,4-difluoroaniline (2.9 ml) and isopropanol (170 ml) was stirred and heated to reflux for 4 hours. The precipitate was isolated, washed with isopropanol and dried. There was thus obtained 6-acetoxy-4-(3',4'-difluoroanilino)-7-methoxyquinazoline hydrochloride (7.5 g); NMR Spectrum: 2.4 (s, 3H), 4.0 (s, 3H), 7.45-7.6 (m, 3H), 7.95 (m, 1H), 8.8 (s, 1H), 8.95 (s, 1H), 11.5 (broad s, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In neat (no solvent); at 160℃; | General procedure: A mixture of compound 3 (0.2 g, 1.03 mmol) and the appropriate aniline (1.03 mmol) were reacted neat at 160 C for 10-120 minutes. The reaction mixture was cooled, dissolved in DCM and concentrated under reduced pressure to afford the desired product, which was used directly in the next step without further purification. |
Tags: 3,4-Difluoroaniline | Fluorinated Building Blocks | Aryls | Amines | Organic Building Blocks | 3863-11-4
Precautionary Statements-General | |
Code | Phrase |
P101 | If medical advice is needed,have product container or label at hand. |
P102 | Keep out of reach of children. |
P103 | Read label before use |
Prevention | |
Code | Phrase |
P201 | Obtain special instructions before use. |
P202 | Do not handle until all safety precautions have been read and understood. |
P210 | Keep away from heat/sparks/open flames/hot surfaces. - No smoking. |
P211 | Do not spray on an open flame or other ignition source. |
P220 | Keep/Store away from clothing/combustible materials. |
P221 | Take any precaution to avoid mixing with combustibles |
P222 | Do not allow contact with air. |
P223 | Keep away from any possible contact with water, because of violent reaction and possible flash fire. |
P230 | Keep wetted |
P231 | Handle under inert gas. |
P232 | Protect from moisture. |
P233 | Keep container tightly closed. |
P234 | Keep only in original container. |
P235 | Keep cool |
P240 | Ground/bond container and receiving equipment. |
P241 | Use explosion-proof electrical/ventilating/lighting/equipment. |
P242 | Use only non-sparking tools. |
P243 | Take precautionary measures against static discharge. |
P244 | Keep reduction valves free from grease and oil. |
P250 | Do not subject to grinding/shock/friction. |
P251 | Pressurized container: Do not pierce or burn, even after use. |
P260 | Do not breathe dust/fume/gas/mist/vapours/spray. |
P261 | Avoid breathing dust/fume/gas/mist/vapours/spray. |
P262 | Do not get in eyes, on skin, or on clothing. |
P263 | Avoid contact during pregnancy/while nursing. |
P264 | Wash hands thoroughly after handling. |
P265 | Wash skin thouroughly after handling. |
P270 | Do not eat, drink or smoke when using this product. |
P271 | Use only outdoors or in a well-ventilated area. |
P272 | Contaminated work clothing should not be allowed out of the workplace. |
P273 | Avoid release to the environment. |
P280 | Wear protective gloves/protective clothing/eye protection/face protection. |
P281 | Use personal protective equipment as required. |
P282 | Wear cold insulating gloves/face shield/eye protection. |
P283 | Wear fire/flame resistant/retardant clothing. |
P284 | Wear respiratory protection. |
P285 | In case of inadequate ventilation wear respiratory protection. |
P231 + P232 | Handle under inert gas. Protect from moisture. |
P235 + P410 | Keep cool. Protect from sunlight. |
Response | |
Code | Phrase |
P301 | IF SWALLOWED: |
P304 | IF INHALED: |
P305 | IF IN EYES: |
P306 | IF ON CLOTHING: |
P307 | IF exposed: |
P308 | IF exposed or concerned: |
P309 | IF exposed or if you feel unwell: |
P310 | Immediately call a POISON CENTER or doctor/physician. |
P311 | Call a POISON CENTER or doctor/physician. |
P312 | Call a POISON CENTER or doctor/physician if you feel unwell. |
P313 | Get medical advice/attention. |
P314 | Get medical advice/attention if you feel unwell. |
P315 | Get immediate medical advice/attention. |
P320 | |
P302 + P352 | IF ON SKIN: wash with plenty of soap and water. |
P321 | |
P322 | |
P330 | Rinse mouth. |
P331 | Do NOT induce vomiting. |
P332 | IF SKIN irritation occurs: |
P333 | If skin irritation or rash occurs: |
P334 | Immerse in cool water/wrap n wet bandages. |
P335 | Brush off loose particles from skin. |
P336 | Thaw frosted parts with lukewarm water. Do not rub affected area. |
P337 | If eye irritation persists: |
P338 | Remove contact lenses, if present and easy to do. Continue rinsing. |
P340 | Remove victim to fresh air and keep at rest in a position comfortable for breathing. |
P341 | If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. |
P342 | If experiencing respiratory symptoms: |
P350 | Gently wash with plenty of soap and water. |
P351 | Rinse cautiously with water for several minutes. |
P352 | Wash with plenty of soap and water. |
P353 | Rinse skin with water/shower. |
P360 | Rinse immediately contaminated clothing and skin with plenty of water before removing clothes. |
P361 | Remove/Take off immediately all contaminated clothing. |
P362 | Take off contaminated clothing and wash before reuse. |
P363 | Wash contaminated clothing before reuse. |
P370 | In case of fire: |
P371 | In case of major fire and large quantities: |
P372 | Explosion risk in case of fire. |
P373 | DO NOT fight fire when fire reaches explosives. |
P374 | Fight fire with normal precautions from a reasonable distance. |
P376 | Stop leak if safe to do so. Oxidising gases (section 2.4) 1 |
P377 | Leaking gas fire: Do not extinguish, unless leak can be stopped safely. |
P378 | |
P380 | Evacuate area. |
P381 | Eliminate all ignition sources if safe to do so. |
P390 | Absorb spillage to prevent material damage. |
P391 | Collect spillage. Hazardous to the aquatic environment |
P301 + P310 | IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. |
P301 + P312 | IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. |
P301 + P330 + P331 | IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. |
P302 + P334 | IF ON SKIN: Immerse in cool water/wrap in wet bandages. |
P302 + P350 | IF ON SKIN: Gently wash with plenty of soap and water. |
P303 + P361 + P353 | IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. |
P304 + P312 | IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell. |
P304 + P340 | IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. |
P304 + P341 | IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. |
P305 + P351 + P338 | IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. |
P306 + P360 | IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes. |
P307 + P311 | IF exposed: call a POISON CENTER or doctor/physician. |
P308 + P313 | IF exposed or concerned: Get medical advice/attention. |
P309 + P311 | IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician. |
P332 + P313 | IF SKIN irritation occurs: Get medical advice/attention. |
P333 + P313 | IF SKIN irritation or rash occurs: Get medical advice/attention. |
P335 + P334 | Brush off loose particles from skin. Immerse in cool water/wrap in wet bandages. |
P337 + P313 | IF eye irritation persists: Get medical advice/attention. |
P342 + P311 | IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician. |
P370 + P376 | In case of fire: Stop leak if safe to Do so. |
P370 + P378 | In case of fire: |
P370 + P380 | In case of fire: Evacuate area. |
P370 + P380 + P375 | In case of fire: Evacuate area. Fight fire remotely due to the risk of explosion. |
P371 + P380 + P375 | In case of major fire and large quantities: Evacuate area. Fight fire remotely due to the risk of explosion. |
Storage | |
Code | Phrase |
P401 | |
P402 | Store in a dry place. |
P403 | Store in a well-ventilated place. |
P404 | Store in a closed container. |
P405 | Store locked up. |
P406 | Store in corrosive resistant/ container with a resistant inner liner. |
P407 | Maintain air gap between stacks/pallets. |
P410 | Protect from sunlight. |
P411 | |
P412 | Do not expose to temperatures exceeding 50 oC/ 122 oF. |
P413 | |
P420 | Store away from other materials. |
P422 | |
P402 + P404 | Store in a dry place. Store in a closed container. |
P403 + P233 | Store in a well-ventilated place. Keep container tightly closed. |
P403 + P235 | Store in a well-ventilated place. Keep cool. |
P410 + P403 | Protect from sunlight. Store in a well-ventilated place. |
P410 + P412 | Protect from sunlight. Do not expose to temperatures exceeding 50 oC/122oF. |
P411 + P235 | Keep cool. |
Disposal | |
Code | Phrase |
P501 | Dispose of contents/container to ... |
P502 | Refer to manufacturer/supplier for information on recovery/recycling |
Physical hazards | |
Code | Phrase |
H200 | Unstable explosive |
H201 | Explosive; mass explosion hazard |
H202 | Explosive; severe projection hazard |
H203 | Explosive; fire, blast or projection hazard |
H204 | Fire or projection hazard |
H205 | May mass explode in fire |
H220 | Extremely flammable gas |
H221 | Flammable gas |
H222 | Extremely flammable aerosol |
H223 | Flammable aerosol |
H224 | Extremely flammable liquid and vapour |
H225 | Highly flammable liquid and vapour |
H226 | Flammable liquid and vapour |
H227 | Combustible liquid |
H228 | Flammable solid |
H229 | Pressurized container: may burst if heated |
H230 | May react explosively even in the absence of air |
H231 | May react explosively even in the absence of air at elevated pressure and/or temperature |
H240 | Heating may cause an explosion |
H241 | Heating may cause a fire or explosion |
H242 | Heating may cause a fire |
H250 | Catches fire spontaneously if exposed to air |
H251 | Self-heating; may catch fire |
H252 | Self-heating in large quantities; may catch fire |
H260 | In contact with water releases flammable gases which may ignite spontaneously |
H261 | In contact with water releases flammable gas |
H270 | May cause or intensify fire; oxidizer |
H271 | May cause fire or explosion; strong oxidizer |
H272 | May intensify fire; oxidizer |
H280 | Contains gas under pressure; may explode if heated |
H281 | Contains refrigerated gas; may cause cryogenic burns or injury |
H290 | May be corrosive to metals |
Health hazards | |
Code | Phrase |
H300 | Fatal if swallowed |
H301 | Toxic if swallowed |
H302 | Harmful if swallowed |
H303 | May be harmful if swallowed |
H304 | May be fatal if swallowed and enters airways |
H305 | May be harmful if swallowed and enters airways |
H310 | Fatal in contact with skin |
H311 | Toxic in contact with skin |
H312 | Harmful in contact with skin |
H313 | May be harmful in contact with skin |
H314 | Causes severe skin burns and eye damage |
H315 | Causes skin irritation |
H316 | Causes mild skin irritation |
H317 | May cause an allergic skin reaction |
H318 | Causes serious eye damage |
H319 | Causes serious eye irritation |
H320 | Causes eye irritation |
H330 | Fatal if inhaled |
H331 | Toxic if inhaled |
H332 | Harmful if inhaled |
H333 | May be harmful if inhaled |
H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled |
H335 | May cause respiratory irritation |
H336 | May cause drowsiness or dizziness |
H340 | May cause genetic defects |
H341 | Suspected of causing genetic defects |
H350 | May cause cancer |
H351 | Suspected of causing cancer |
H360 | May damage fertility or the unborn child |
H361 | Suspected of damaging fertility or the unborn child |
H361d | Suspected of damaging the unborn child |
H362 | May cause harm to breast-fed children |
H370 | Causes damage to organs |
H371 | May cause damage to organs |
H372 | Causes damage to organs through prolonged or repeated exposure |
H373 | May cause damage to organs through prolonged or repeated exposure |
Environmental hazards | |
Code | Phrase |
H400 | Very toxic to aquatic life |
H401 | Toxic to aquatic life |
H402 | Harmful to aquatic life |
H410 | Very toxic to aquatic life with long-lasting effects |
H411 | Toxic to aquatic life with long-lasting effects |
H412 | Harmful to aquatic life with long-lasting effects |
H413 | May cause long-lasting harmful effects to aquatic life |
H420 | Harms public health and the environment by destroying ozone in the upper atmosphere |
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