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5-Ethoxy-4-methyloxazole cas 5006-20-2Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
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4-methyl-5-ethoxy-2-carboxyoxazole
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
With hydrogenchloride In chloroform at 50℃; pH=2.5; | 94.8% |
at 90℃; for 1h; Temperature; |
4-methyl-5-ethoxy-2-oxazole carboxylate ethyl ester
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
Stage #1: 4-methyl-5-ethoxy-2-oxazole carboxylate ethyl ester With sodium hydroxide Stage #2: With hydrogenchloride | 89.9% |
With toluene-4-sulfonic acid; acetic acid In toluene at 90℃; for 3h; Solvent; Temperature; Reagent/catalyst; | 93.7 %Chromat. |
Stage #1: 4-methyl-5-ethoxy-2-oxazole carboxylate ethyl ester With sodium hydroxide In water Stage #2: With hydrogenchloride In water at 60 - 62℃; pH=2.5; |
Conditions | Yield |
---|---|
With boron trifluoride diethyl etherate; magnesium oxide In dichloromethane at 120℃; for 8h; Reagent/catalyst; Temperature; Solvent; Sealed tube; | 71% |
With phosphorus pentoxide; magnesium oxide In chloroform for 20h; Heating; | 50% |
With phosphorus pentoxide In dichloromethane for 48h; Reflux; | 50% |
AlaOEt
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 1.5 h / Reflux 2: phosphorus pentoxide; magnesium oxide / chloroform / 20.5 h / 20 °C / Inert atmosphere; Reflux View Scheme | |
Multi-step reaction with 2 steps 1: 2 h / 160 °C 2: 48 h / Reflux View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 1 h / 76 °C / Inert atmosphere 2: 2 h / 150 °C / Inert atmosphere View Scheme |
formamide
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
at 150℃; for 2h; Temperature; Inert atmosphere; | 30.5 g |
formamide
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
at 130℃; for 2h; Temperature; Inert atmosphere; | 28.5 g |
N-ethoxyoxalylalanine ethyl ester
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: triethylamine; trichlorophosphate / toluene / 3 h / 55 - 110 °C 2: water; sodium hydroxide / 5 h / 50 - 55 °C / pH 14 3: 1 h / 90 °C View Scheme | |
With triethylamine; Triphenylphosphine oxide; trichloromethyl chloroformate In dichloromethane at 0 - 50℃; for 2.5h; Reagent/catalyst; Solvent; | 97 %Chromat. |
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid; acetic acid In 1,4-dioxane at 90℃; for 2h; Reagent/catalyst; Solvent; | 93.7 %Chromat. |
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
With sodium acetate; benzoic acid In acetonitrile at 90℃; for 2h; | 40.2 %Chromat. |
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
With sodium acetate; benzoic acid In acetonitrile at 90℃; for 2h; | 10.2 %Chromat. |
Conditions | Yield |
---|---|
With propionic acid; trifluoroacetic acid In acetonitrile at 70℃; for 3.5h; | A 85.3 %Chromat. B 7 %Chromat. |
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
With hydrogenchloride In ethanol at 60 - 65℃; for 0.166667h; Temperature; Flow reactor; |
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: bis(trichloromethyl) carbonate; Triphenylphosphine oxide; triethylamine / toluene / 3 h / 25 - 50 °C 2.1: sodium hydroxide / water 2.2: 60 - 62 °C / pH 2.5 View Scheme |
5-ethoxy-4-methyl-oxazole
2-isopropyl-4,7-dihydro-[1,3]dioxepine
acetic anhydride
8-methyl-3-(propan-2-yl)-1H,3H,5H-[1,3]dioxepino[5,6-c]pyridin-9-yl acetate
Conditions | Yield |
---|---|
at 140 - 145℃; under 1500.15 - 2250.23 Torr; for 8h; Temperature; Pressure; Autoclave; Inert atmosphere; | 97.7% |
5-ethoxy-4-methyl-oxazole
acetic anhydride
2-propyl-4,7-dihydro-2H-1,3-dioxepine
Conditions | Yield |
---|---|
at 135 - 145℃; under 1500.15 - 2250.23 Torr; for 8h; Temperature; Pressure; Autoclave; Inert atmosphere; | 97.5% |
Conditions | Yield |
---|---|
With titanium(IV) oxide at 100℃; for 8h; Time; Reagent/catalyst; Temperature; Diels-Alder Cycloaddition; Inert atmosphere; Irradiation; | 96.2% |
With sodium-type cation exchange resin In cyclohexane at 80 - 150℃; for 15h; Temperature; Diels-Alder Cycloaddition; |
Conditions | Yield |
---|---|
at 40℃; for 4h; | 93% |
Conditions | Yield |
---|---|
In toluene for 3h; Heating; | 90% |
5-ethoxy-4-methyl-oxazole
acrylonitrile
2-methyl-3-hydroxy-4-cyanopyridine
Conditions | Yield |
---|---|
for 4h; Ambient temperature; | 85% |
5-ethoxy-4-methyl-oxazole
acrylic acid
2-methyl-3-hydroxy-4-pyridinecarboxylic acid
Conditions | Yield |
---|---|
Ambient temperature; | 85% |
at 4℃; Diels-Alder reaction; | 60% |
at 4 - 20℃; |
5-ethoxy-4-methyl-oxazole
2-formyl-4,4-dimethylcyclohexa-2,5-dien-1-one
Conditions | Yield |
---|---|
With zinc dibromide In benzene for 0.5h; Heating; | 85% |
5-ethoxy-4-methyl-oxazole
2-propyl-4,7-dihydro-2H-1,3-dioxepine
pyridoxal hydrochloride
Conditions | Yield |
---|---|
With hydrogenchloride Diels-Alder Cycloaddition; | 78.5% |
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
In toluene at 120℃; for 24h; | 65% |
5-ethoxy-4-methyl-oxazole
1-ethyl-3-formyl-2-propynyl benzoate
5-ethoxy-4-formyl-3-(1-phenylcarbonyloxypropyl)furan
Conditions | Yield |
---|---|
In toluene for 12h; Diels-Alder reaction; Heating; | 65% |
2,5-dihydrofuran
5-ethoxy-4-methyl-oxazole
7-hydroxy-6-methyl-1,3-dihydrofuro<3,4-c>pyridin
Conditions | Yield |
---|---|
With trichloroacetic acid at 200℃; for 5h; Diels-Alder Cycloaddition; | 57% |
Conditions | Yield |
---|---|
In toluene at 120℃; for 48h; | 56% |
5-ethoxy-4-methyl-oxazole
ethyl <3-oxo-2H-isothiazol-2-yl>acetate 1,1-dioxide
Ethyl 4α-Ethoxy-2,3,3aα,4,7α,7aα-hexahydro-5-methyl-3-oxo-4,7-epoxyisothiazolo<5,4-c>pyridine-2-acetate 1,1-Dioxide
Conditions | Yield |
---|---|
In benzene Ambient temperature; | 55% |
5-ethoxy-4-methyl-oxazole
Conditions | Yield |
---|---|
Stage #1: 5-ethoxy-4-methyl-oxazole; 3-(3-bromo-4-methoxyphenyl)-1-phenylprop-2-yn-1-one In 5,5-dimethyl-1,3-cyclohexadiene at 145 - 150℃; for 24h; Inert atmosphere; Stage #2: With hydrogen bromide In tetrahydrofuran; water at 20℃; for 8h; Inert atmosphere; | 51% |
5-ethoxy-4-methyl-oxazole
5-(4-methoxyphenoxy)pent-3-yn-2-one
3-acetyl-2-ethoxy-4-[(4-methoxyphenoxy)methyl]furan
Conditions | Yield |
---|---|
In toluene for 3h; tandem Diels-Alder-retro-Diels-Alder reaction; Heating; | 46% |
5-ethoxy-4-methyl-oxazole
2-(p-methoxybenzyl)isothiazol-3(2H)-one 1,1-dioxide
4α-Ethoxy-3aα,4,7α,7aα-tetrahydro-2-(4-methoxybenzyl)-5-methyl-4,7-epoxyisothiazolo<5,4-c>pyridin-3(2H)-one 1,1 Dioxide
Conditions | Yield |
---|---|
In benzene Ambient temperature; | 45% |
5-ethoxy-4-methyl-oxazole
2-vinyl pyridine hydrochloride
2'-Methyl-[2,4']bipyridinyl-3'-ol
Conditions | Yield |
---|---|
In acetic acid 1.)reflux, 8 h 2.)r.t., overnight; | 45% |
Conditions | Yield |
---|---|
at 110℃; for 3h; Diels-Alder reaction; | A 24% B 41% |
Conditions | Yield |
---|---|
With zinc dibromide In benzene for 48h; Heating; | 35% |
Conditions | Yield |
---|---|
Ambient temperature; | 33% |
Conditions | Yield |
---|---|
Ambient temperature; | 29% |
Conditions | Yield |
---|---|
Ambient temperature; | 25% |
Conditions | Yield |
---|---|
Ambient temperature; | 25% |
5-ethoxy-4-methyl-oxazole
ethyl 4,4,4-trifluorocrotonate
Conditions | Yield |
---|---|
at 120℃; for 48h; | A 25% B 8% |
Conditions | Yield |
---|---|
Ambient temperature; | 24% |
5-ethoxy-4-methyl-oxazole
3,4-dimethyl-cyclohex-2-enone
Conditions | Yield |
---|---|
With zinc dibromide In benzene at 90℃; for 12h; | 24% |
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