24829-91-2|3-Bromocyclohexane-1,2-dione| Ambeed

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CAS No. :	24829-91-2
Formula :	C₆H₇BrO₂
M.W :	191.02
SMILES Code :	O=C1C(C(Br)CCC1)=O
MDL No. :	MFCD20620987

Yield	Reaction Conditions	Operation in experiment
71%	for 15 h; Reflux	General procedure: A mixture of 3-bromocyclohexane-1,2-dione 3 (50 mg, 0.26 mmol) and pyridine-4-carbothioamide (24.1 mg, 0.17 mmol) in EtOH (0.69 mL) was heated to reflux and stirred for 15 h. The reaction mixture was diluted with DMSO (0.5 mL) to completely dissolve all solids and the resulting mixture was purified by directly injecting the reaction mixture into a preparatory HPLC (C₁₈, water/acetonitrile/ammonium acetate buffer) to give 2-(pyridin-4-yl)-6,7-dihydrobenzo[d]thiazol-4(5H)-one (30.4 mg, 0.13 mmol, 76percent) (Table 1, entry 1).
47%	at 90℃; for 16 h;	Int-35 (5.0 g, 26.17 mmol) was dissolved in EtOH (50 mL) and thiourea (1.99 g, 26.17 mmol) was added at rt. Then the mixture was heated at 90 °C for 16 h. After cooling down to rt, the mixture was concentrated under reduced pressure and the residue was diluted with water (50 mL) and extracted with EtOAc (2 x 150 mL). Combined organic layers were washed with water (50 mL), brine (50 mL), dried over anhydrous Na2SO4 and concentrated under reduced pressure. The crude product was purified by colunm chromatography on reversed phase silica gel using water/acetonitrile with 0.01percent formic acid as eluent. 2-Amino-6,7-dihydrobenzo[d]thiazol-4(5H)-one (int-36) was obtained as an off-white solid in 47percent (2.1 g) yield. MS (ESI) mlz 169.01 [M-H].

Precautionary Statements-General
Code	Phrase
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Prevention
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Code	Phrase
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P321
P322
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P378
P380	Evacuate area.
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P390	Absorb spillage to prevent material damage.
P391	Collect spillage. Hazardous to the aquatic environment
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P301 + P312	IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
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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.
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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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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.
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P370 + P378	In case of fire:
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Storage
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P401
P402	Store in a dry place.
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Disposal
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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
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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
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H336	May cause drowsiness or dizziness
H340	May cause genetic defects
H341	Suspected of causing genetic defects
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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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CAS No.: 24829-91-2

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CAS No.: 24829-91-2

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[ 24829-91-2 ] Synthesis Path-Upstream 1~1

[ 24829-91-2 ] Synthesis Path-Downstream 1~3

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