ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

Base Information

Chemical Name:ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate
CAS No.:173033-28-8
Molecular Formula:C₂₅H₂₁NO₆
Molecular Weight:431.445
Hs Code.:

Synonyms:ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

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Chemical Property of ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

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Technology Process of ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

There total 10 articles about ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 60.0%

: 173033-21-1
ethyl 2-[(1E,3E)-4-(4-methoxymethoxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

: 173033-28-8
ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

Guidance literature:: With toluene-4-sulfonic acid; In dichloromethane; at 20 ℃;

Reference yield:

: 30192-51-9
ethyl 8-amino-7-hydroxy-4-oxo-4H-1-benzopyran-2-carboxylate

: 173033-28-8
ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

Guidance literature:: Multi-step reaction with 5 steps

1: 92 percent / NaHCO₃ / acetone / 2 h / 20 °C

2: 84 percent / ethyl polyphosphate / 1,2-dichloro-ethane / 4 h / Heating

3: 93 percent / 4 h / 140 °C

4: 98 percent / NaH; molecular sieves (4 Angstroem) / tetrahydrofuran / 20 °C

5: 60 percent / p-TsOH*H₂O / CH₂Cl₂ / 20 °C

With ethyl phosphate; 4 A molecular sieve; sodium hydride; sodium hydrogencarbonate; toluene-4-sulfonic acid; In tetrahydrofuran; dichloromethane; 1,2-dichloro-ethane; acetone; 1: chloroacetylation / 2: Cyclization / 3: Substitution / 4: Condensation / 5: Hydrolysis;

Reference yield:

: 32278-24-3
ethyl 8-N-(chloroacetyl)amino-7-hydroxy-4-oxo-4H-1-benzopyran-2-carboxylate

: 173033-28-8
ethyl 2-[(1E,3E)-4-(4-hydroxy-3,5-dimethylphenyl)-1,3-butadienyl]-6-oxo-6H-pyrano[2,3-e]benzoxazole-8-carboxylate

Guidance literature:: Multi-step reaction with 4 steps

1: 84 percent / ethyl polyphosphate / 1,2-dichloro-ethane / 4 h / Heating

2: 93 percent / 4 h / 140 °C

3: 98 percent / NaH; molecular sieves (4 Angstroem) / tetrahydrofuran / 20 °C

4: 60 percent / p-TsOH*H₂O / CH₂Cl₂ / 20 °C

With ethyl phosphate; 4 A molecular sieve; sodium hydride; toluene-4-sulfonic acid; In tetrahydrofuran; dichloromethane; 1,2-dichloro-ethane; 1: Cyclization / 2: Substitution / 3: Condensation / 4: Hydrolysis;