142137-18-6|3-Bromo-5-(methylthio)pyridine| Ambeed

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CAS No. :	142137-18-6
Formula :	C₆H₆BrNS
M.W :	204.09
SMILES Code :	CSC1=CN=CC(Br)=C1
MDL No. :	MFCD08689537

GHS Pictogram:
Signal Word:	Warning
Hazard Statements:	H302-H315-H319-H335
Precautionary Statements:	P261-P305+P351+P338

Yield	Reaction Conditions	Operation in experiment
82%	With 3-chloro-benzenecarboperoxoic acid; In dichloromethane;	d 3-Bromo-5-methanesulfonyl-pyridine MCPBA (9.2 g, 38 mmol) was added slowly to a solution of 3-bromo-5-methylsulfanyl-pyridine (3.8 g, 19 mmol) in dichloromethane (50 mL). After stirring for 30 minutes, the reaction was diluted with dichloromethane and quenched carefully with 1N NaOII. The product was extracted with dichloromethane and dried over magnesium sulfate. The solvent was removed under reduced pressure to give title compound (2.7 g, 82% yield) as a white solid.
47%	With 3-chloro-benzenecarboperoxoic acid; In dichloromethane; at 20℃; for 0.5h;	To a solution of 3-bromo-5-methanesulfanyl-pyridine (8.80 g, 43 mmol) in CH2Cl2 was treated slowly portionwise with 3-chloroperbenzoic acid (21.26 g, 86 mmol) at rt (exothermic reaction). The reaction mixture was stirred for 30 minutes at rt under Argon, then diluted with an additional portion of CH2Cl2 and washed with 1N NaOH solution. The aqueous layer was extracted with 3 portions of CH2Cl2 and the combined layers were dried over MgSO4, filtered and concentrated to give the title compound (4.75 g, 47%) as a white solid. MS (ISP) 236.1 [(M+H)+], 237.9[(M+2+H)+].
	With Oxone; sodium hydrogencarbonate; In tetrahydrofuran; methanol; water; at 20℃; for 4.0h;	To 3,5-dibromopyridine (2.96 g, 12.5 mmol) in diethyl ether (70 ml) at -78 C. was added n-butyllithium 1.6M in hexanes (8.6 ml, 13.7 mmol) and the resulting mixture was stirred in the cold for 3 hours. Dimethyl disulfide (1.12 ml, 12.5 mmol) was added and the mixture was warmed to room temperature, then partitioned between ether and water. To the crude product from evaporation of the organic phase was added tetrahydrofuran (80 ml), methanol (20 ml), oxone (17 g) and enough saturated aqueous sodium bicarbonate to afford a slightly basic medium. After stirring for 4 hours at room temperature, an excess of 1M aqueous sodium metabisulfite was added, the organic solvents were evaporated, and the residue was partitioned between ethyl acetate and water. The crude product from the organic phase was stirred in a small volume of ethyl acetate and filtered to afford the 3-Bromo-5-methylsulfonylpyridine compound as a solid.

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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
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P234	Keep only in original container.
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Code	Phrase
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P378
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P301 + P312	IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
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P306 + P360	IF ON CLOTHING: Rinse Immediately contaminated CLOTHING and SKIN with plenty of water before removing clothes.
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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
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P401
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P402 + P404	Store in a dry place. Store in a closed container.
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P411 + P235	Keep cool.
Disposal
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P501	Dispose of contents/container to ...
P502	Refer to manufacturer/supplier for information on recovery/recycling

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CAS No.: 142137-18-6

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CAS No.: 142137-18-6

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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
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