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Name	1-(1,4-Benzodioxane-2-carbonyl)piperazine	EINECS	415-660-9
CAS No.	70918-00-2	Density	1.246 g/cm³
PSA	50.80000	LogP	0.52490
Solubility	N/A	Melting Point	141 °C
Formula	C₁₃H₁₆N₂O₃	Boiling Point	437.2 °C at 760 mmHg
Molecular Weight	248.282	Flash Point	218.2 °C
Transport Information	N/A	Appearance	N/A
Safety	53-45-61	Risk Codes	Xi:;
Molecular Structure		Hazard Symbols	Xi
Synonyms	Piperazine,1-[(2,3-dihydro-1,4-benzodioxin-2-yl)carbonyl]- (9CI);1-[(2,3-Dihydro-1,4-benzodioxin-2-yl)carbonyl]piperazine;	Article Data	12

1-(1,4-Benzodioxane-2-carbonyl)piperazine Synthetic route

: 110-85-0
piperazine

: 3663-80-7, 34385-93-8, 70918-53-5, 70918-54-6
1,4-benzodioxane-2-carboxylic acid

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
Stage #1: 1,4-benzodioxane-2-carboxylic acid With N-Bromosuccinimide; triphenylphosphine In dichloromethane at 0 - 5℃; for 0.25h; Stage #2: piperazine With pyridine In dichloromethane at 20℃; for 0.5h;	96%
With 4-methyl-morpholine; 2-chloro-4,6-dimethoxy-1 ,3,5-triazine In dichloromethane at 20℃; for 0.166667h;	95%
With 1,1,1,3,3,3-hexamethyl-disilazane at 110℃; for 5h;	91%
With benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide at 20℃; Inert atmosphere;	84%
With 1,1,1,3,3,3-hexamethyl-disilazane at 110℃; for 15h;	32%

: C18H24N2O5

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
With trifluoroacetic acid In dichloromethane at 0 - 20℃; for 1.25h;	96%

: 110-85-0
piperazine

: 4739-94-0
ethyl 2,3-dihydro-1,4-benzodioxin-2-carboxylate

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
at 110℃; for 3h;	94%
In methanol; isopropyl alcohol Heating;	73.13%
at 75℃; for 4 - 10h;	30%

: 110-85-0
piperazine

: 4739-94-0
ethyl 2,3-dihydro-1,4-benzodioxin-2-carboxylate

A: 1,4-bis-(2,3-dihydro-benzo[1,4]dioxin-2-carbonyl)-piperazine

B: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
at 75 - 80℃; for 10h;	A 11% B 89%
at 70 - 80℃; for 6h;	A 12% B 65%

: 110-85-0
piperazine

: C12H16O4Si

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
at 110℃; for 5h;

: 120-80-9
benzene-1,2-diol

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 85 percent / potassium hydroxide; polyethylene glycol-400; potassium carbonate / toluene / 3.75 h / Heating 2: 65 percent / 6 h / 70 - 80 °C View Scheme

: 3663-80-7, 34385-93-8, 70918-53-5, 70918-54-6
1,4-benzodioxane-2-carboxylic acid

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 2 h / 110 °C 2: 5 h / 110 °C View Scheme
Multi-step reaction with 2 steps 1: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N,N-tetramethyluroniumhexafluorophosphate / dichloromethane / -15 °C / Inert atmosphere 2: trifluoroacetic acid / dichloromethane / 1.25 h / 0 - 20 °C View Scheme

: 3663-82-9
2-hydroxymethyl-2,3-dihydrobenzo[1,4]dioxin

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
Multi-step reaction with 3 steps 1: potassium hydroxide; potassium permanganate / water / 0 °C 2: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N,N-tetramethyluroniumhexafluorophosphate / dichloromethane / -15 °C / Inert atmosphere 3: trifluoroacetic acid / dichloromethane / 1.25 h / 0 - 20 °C View Scheme

: 533-58-4
2-Iodophenol

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
Multi-step reaction with 6 steps 1: potassium carbonate / N,N-dimethyl-formamide; water; ethyl acetate / 24 h / 50 °C 2: sodium tetrahydroborate / tetrahydrofuran; methanol / 6 h / 0 °C 3: copper(l) iodide; 1,10-Phenanthroline; caesium carbonate / toluene / 90 °C / Sealed tube; Inert atmosphere 4: potassium hydroxide; potassium permanganate / water / 0 °C 5: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N,N-tetramethyluroniumhexafluorophosphate / dichloromethane / -15 °C / Inert atmosphere 6: trifluoroacetic acid / dichloromethane / 1.25 h / 0 - 20 °C View Scheme

Yield

Multi-step reaction with 6 steps
1: potassium carbonate / N,N-dimethyl-formamide; water; ethyl acetate / 24 h / 50 °C
2: sodium tetrahydroborate / tetrahydrofuran; methanol / 6 h / 0 °C
3: copper(l) iodide; 1,10-Phenanthroline; caesium carbonate / toluene / 90 °C / Sealed tube; Inert atmosphere
4: potassium hydroxide; potassium permanganate / water / 0 °C
5: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N,N-tetramethyluroniumhexafluorophosphate / dichloromethane / -15 °C / Inert atmosphere
6: trifluoroacetic acid / dichloromethane / 1.25 h / 0 - 20 °C
View Scheme

: C13H15IO5

: 70918-00-2
(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)(piperazin-1-yl)methanone

Conditions

Conditions	Yield
Multi-step reaction with 5 steps 1: sodium tetrahydroborate / tetrahydrofuran; methanol / 6 h / 0 °C 2: copper(l) iodide; 1,10-Phenanthroline; caesium carbonate / toluene / 90 °C / Sealed tube; Inert atmosphere 3: potassium hydroxide; potassium permanganate / water / 0 °C 4: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N,N-tetramethyluroniumhexafluorophosphate / dichloromethane / -15 °C / Inert atmosphere 5: trifluoroacetic acid / dichloromethane / 1.25 h / 0 - 20 °C View Scheme

Yield

Multi-step reaction with 5 steps
1: sodium tetrahydroborate / tetrahydrofuran; methanol / 6 h / 0 °C
2: copper(l) iodide; 1,10-Phenanthroline; caesium carbonate / toluene / 90 °C / Sealed tube; Inert atmosphere
3: potassium hydroxide; potassium permanganate / water / 0 °C
4: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N,N-tetramethyluroniumhexafluorophosphate / dichloromethane / -15 °C / Inert atmosphere
5: trifluoroacetic acid / dichloromethane / 1.25 h / 0 - 20 °C
View Scheme

1-(1,4-Benzodioxane-2-carbonyl)piperazine Chemical Properties

Molecular Structure of Methanone,(2,3-dihydro-1,4-benzodioxin-2-yl)-1-piperazinyl- (CAS NO.70918-00-2):

Molecular Formula: C₁₃H₁₆N₂O₃
Molecular Weight: 248.2777
IUPAC Name: 2,3-Dihydro-1,4-benzodioxin-3-yl(piperazin-1-yl)methanone
Synonyms of Methanone,(2,3-dihydro-1,4-benzodioxin-2-yl)-1-piperazinyl- (CAS NO.70918-00-2): 1-(1,4-Benzodioxane-2-carbonyl)piperazine ; 1-[(2,3-Dihydro-1,4-benzodiaxan-2-yl)carbonyl]piperazine
CAS NO: 70918-00-2
Index of Refraction: 1.565
Molar Refractivity: 64.95 cm³
Molar Volume: 199.1 cm³
Surface Tension: 47 dyne/cm
Density: 1.246 g/cm³
Flash Point: 218.2 °C
Enthalpy of Vaporization: 69.38 kJ/mol
Boiling Point: 437.2 °C at 760 mmHg
Vapour Pressure: 7.62E-08 mmHg at 25°C

1-(1,4-Benzodioxane-2-carbonyl)piperazine Safety Profile

Hazard Codes of Methanone,(2,3-dihydro-1,4-benzodioxin-2-yl)-1-piperazinyl- (CAS NO.70918-00-2): Xi
HazardClass: IRRITANT

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