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Name	2-Acetyl-2-thiazoline	EINECS	N/A
CAS No.	29926-41-8	Density	1.29 g/cm³
PSA	54.73000	LogP	0.15630
Solubility	N/A	Melting Point	26-30 °C(lit.)
Formula	C₅H₇NOS	Boiling Point	223.8 °C at 760 mmHg
Molecular Weight	129.183	Flash Point	89.2 °C
Transport Information	UN 2811 6.1/PG 3	Appearance	Light yellow liquid
Safety	26	Risk Codes	22-36
Molecular Structure		Hazard Symbols	Xn
Synonyms	Ethanone, 1-(4,5-dihydro-2-thiazolyl)-;1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone;	Article Data	4

2-Acetyl-2-thiazoline Synthetic route

: 67399-73-9
2-acetyl-1,3-thiazolidine

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

Conditions

Conditions	Yield
With tert.-butylhydroperoxide; ruthenium trichloride; N,N,N,N,-tetramethylethylenediamine In acetonitrile at 20℃; for 4h; Catalytic oxidation;	70%

: 16982-46-0
2-ethyl-2-thiazoline

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

Conditions

Conditions	Yield
Stage #1: 2-ethyl-2-thiazoline With tert.-butylhydroperoxide; selenium(IV) oxide In dichloromethane at 20℃; for 3h; Stage #2: With triphenylphosphine In dichloromethane at 0℃; for 12h;	40%

: 2-(1-hydroxyethyl)-4,5-dihydrothiazole

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

Conditions

Conditions	Yield
In water at 100℃; for 0.166667h; Thermodynamic data; Product distribution; E(a); var. temp., time and pH;

: 156-57-0
2-mercaptoethylamine hydrochloride

: 78-98-8
2-oxopropanal

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

Conditions

Conditions	Yield
With potassium phosphate buffer; sodium at 6℃; for 18h; Mechanism;

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

: [1-(4,5-Dihydro-thiazol-2-yl)-eth-(E)-ylidene]-hydrazine

Conditions

Conditions	Yield
With hydrazine hydrate In ethanol Condensation; Heating;	72%

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

: 4637-24-5
N,N-dimethyl-formamide dimethyl acetal

: 1233858-23-5
(E)-1-(4,5-dihydrothiazol-2-yl)-3-(dimethylamino)prop-2-en-1-one

Conditions

Conditions	Yield
at 160℃; for 0.333333h; Microwave irradiation;	64%

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

: 79-19-6
thiosemicarbazide

: 2-acetyl-2-thiazoline thiosemicarbazone

Conditions

Conditions	Yield
With acetic acid In acetonitrile for 2h; Reflux;	52%

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

: 762-42-5
dimethyl acetylenedicarboxylate

: 1233858-39-3
dimethyl 6-methyl-5-oxo-2,3,5,7a-tetrahydropyrrolo[2,1-b]thiazole-7,7a-dicarboxylate

Conditions

Conditions	Yield
In acetonitrile at 60℃; for 0.25h; Microwave irradiation;	19%

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

: 3-methyl-5,6-dihydro-thiazolo[3,2-c][1,2,3]triazole

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 72 percent / hydrazine hydrate / ethanol / Heating 2: 88 percent / PhI(OAc)2 / CH2Cl2 / 0.5 h / 20 °C View Scheme

: 29926-41-8
1-(4,5-dihydro-1,3-thiazol-2-yl)ethanone

: 192643-90-6
ethyl 2-(4-hydrazinophenyl)-2-methylpropanoate

: 1076220-44-4
ethyl 2-methyl-2-(2-(1,3-thiazol-2-yl)-1H-indol-5-yl)propanoate

Conditions

Conditions	Yield
With acetic acid; zinc(II) chloride In ethanol

2-Acetyl-2-thiazoline Chemical Properties

Molecule structure of 2-Acetyl-2-thiazoline (CAS NO.29926-41-8):

IUPAC Name: 1-(4,5-Dihydro-1,3-thiazol-2-yl)ethanone
Molecular Weight: 129.18018 g/mol
Molecular Formula: C₅H₇NOS
Density: 1.29 g/cm³
Melting Point: 26-30 °C(lit.)
Boiling Point: 223.8 °C at 760 mmHg
Flash Point: 89.2 °C
Index of Refraction: 1.609
Molar Refractivity: 34.56 cm³
Molar Volume: 99.7 cm³
Polarizability: 13.7×10^-24 cm³
Surface Tension: 46.1 dyne/cm
Enthalpy of Vaporization: 46.03 kJ/mol
Vapour Pressure: 0.0942 mmHg at 25 °C
XLogP3-AA: 0.2
H-Bond Acceptor: 2
Rotatable Bond Count: 1
Tautomer Count: 2
Exact Mass: 129.024835
MonoIsotopic Mass: 129.024835
Topological Polar Surface Area: 29.4
Heavy Atom Count: 8
Complexity: 141
Canonical SMILES: CC(=O)C1=NCCS1
InChI: InChI=1S/C5H7NOS/c1-4(7)5-6-2-3-8-5/h2-3H2,1H3
InChIKey: FZOZFDAMVVEZSJ-UHFFFAOYSA-N
Product Categories of 2-Acetyl-2-thiazoline (CAS NO.29926-41-8): ACETYLGROUP; Aroma Chemicals; thiazole Flavor

2-Acetyl-2-thiazoline Safety Profile

Hazard Codes: Harmful Xn
Risk Statements: 22-36
R22:Harmful if swallowed.
R36:Irritating to eyes.
Safety Statements: 26
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: UN 2811 6.1/PG 3
WGK Germany: 3

2-Acetyl-2-thiazoline Specification

2-Acetyl-2-thiazoline (CAS NO.29926-41-8) is also named as Ethanone, 1-(4,5-dihydro-2-thiazolyl)- .

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