1347736-83-7|3,6-Dibromo-4-fluorobenzene-1,2-diamine| Ambeed

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CAS No. :	1347736-83-7
Formula :	C₆H₅Br₂FN₂
M.W :	283.92
SMILES Code :	NC1=C(C=C(C(Br)=C1N)F)Br
MDL No. :	MFCD31412569
InChI Key :	BHFHVALJBJOMHY-UHFFFAOYSA-N
Pubchem ID :	101538761

GHS Pictogram:
Signal Word:	Warning
Hazard Statements:	H302-H315-H319
Precautionary Statements:	P501-P270-P264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313-P301+P312+P330

Yield	Reaction Conditions	Operation in experiment
78%	With sodium tetrahydroborate; In ethanol; at 0 - 20℃; for 20h;	2.1.1 3,6-Dibromo-4-fluoro-1,2-phenylenediamine (1) 4,7-Dibromo-5-fluoro-2,1,3-benzothiadiazole (5 g, 0.016 mol) was dissolved in ethanol (150 ml), then sodium borohydride (12.1 g, 0.32 mol) was added portion wise at 0 C, and the reactants were stirred for 20 h at room temperature. After evaporation of the solvent, 160 ml water was added, and the mixture was extracted with ethyl acetate. The extract was washed with brine and dried over anhydrous magnesium sulfate. The residue was purified by column chromatography on silica gel using hexane/ethyl acetate (25:1) as eluent to afford 3,6-dibromo-4-fluoro-1,2-phenylenediamine (3.5 g) as a pale solid in 78% yield. 1H NMR (CDCl3, 500 MHz) delta(ppm): 6.81(d,1H,J = 8 Hz), 3.63(s,4H). 13C NMR(500 MHz, CDCl3): delta(ppm), 154.16, 152.25, 135.75, 135.73, 128.73, 128.71, 109.44, 109.35, 108.83, 108.62, 96.78, 96.58. mp: 94 C. Anal. Calcd for (C6H5Br2FN2) (%):C25.38, H 1.78, N 9.87. Found (%):C 24.29, H 1.83, N 10.14.
78%	With sodium tetrahydroborate; In ethanol; at 0 - 20℃; for 20h;	5- fluoro-4, 7-dibromo -2, 1,3-benzothiadiazole(5g, 0.016mol) was dissolvedin 150ml of absolute ethanol. At 0 C, NaBH4 (11. 1g, 0.29mol) was addedportionwise and then reacted at roomtemperature for 20h. After the completion of the reaction, ethanol wasremoved to concentrat. 160ml of water was then added, and the system was extractedwith ethyl acetate. The organic phase was washed with saturated brine andfinally dried over anhydrous MgSO4. The obtained crude product wasconcentrated after removal of the organic solvent. Silica gel columnchromatography and an eluting agent of n-hexane / ethyl acetate (25: 1) wasused to obtain 4-fluoro-3,6-dibromo-1,2-benzenediamine 3.58 g (Compound1), witha yield of 78%
78%	With sodium tetrahydroborate; In ethanol; at 0 - 20℃; for 20h;	To 150 ml of ethanol was added 4,7-dibromo-5-fluoro-2,1,3-benzothiadiazole (4,7-dibromo-5-fluoro-2,1,3- Benzothiadiazole (5 g, 0.016 mol) was dissolved, and sodium borohydride (12.1 g, 0.32 mol) was added at 0 C And stirred at room temperature for 20 hours. After evaporating the solution, 160 ml of water were added and the mixture was extracted with ethyl acetate. The extract was washed with brine, dried over magnesium sulfate and the residue was purified by silica column chromatography (hexane / ethyl acetate (25: 1)) to give 3,6-dibromo-4-fluoro

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CAS No.: 1347736-83-7

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CAS No.: 1347736-83-7

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[ 1347736-83-7 ] Synthesis Path-Downstream 1~3

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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
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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