4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one

Base Information

• Chemical Name: 4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one
• CAS No.: 328314-29-0
• Molecular Formula: C₂₈H₂₈O₉
• Molecular Weight: 508.525
• Mol file: 328314-29-0.mol

Synonyms:4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one

Chemical Property of 4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one

There total 5 articles about 4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one 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: 72.0%

(2,4,6-trimethoxyphenyl)lead triacetate (36896-62-5) + 4-benzyloxycarbonyl-6,7-dimethoxy-2H-1-benzopyran-3(4H)-one (328314-20-1) → 4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one (328314-29-0)

Guidance literature:

With pyridine; In chloroform; at 60 ℃; for 2.5h;

DOI:10.1016/S0040-4020(00)00955-8

Reference yield:

4,5-dimethoxy-2-hydroxy phenylacetic acid (70874-62-3) → 4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one (328314-29-0)

Guidance literature:

Multi-step reaction with 5 steps

1: H₂SO₄ / 8 h / Heating

2: K₂CO₃ / acetone / 8 h / Heating

3: 62 percent / tBuOK / tetrahydrofuran / 19 h / 20 °C

4: 79 percent / DMAP / toluene / 9 h / Heating

5: 72 percent / pyridine / CHCl₃ / 2.5 h / 60 °C

With pyridine; dmap; sulfuric acid; potassium tert-butylate; potassium carbonate; In tetrahydrofuran; chloroform; acetone; toluene; 3: Dieckmann condensation;

DOI:10.1016/S0040-4020(00)00955-8

Reference yield:

methyl (2-methoxycarbonylmethoxy-4,5-dimethoxyphenyl)acetate (97341-39-4) → 4-benzyloxycarbonyl-6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one (328314-29-0)

Guidance literature:

Multi-step reaction with 3 steps

1: 62 percent / tBuOK / tetrahydrofuran / 19 h / 20 °C

2: 79 percent / DMAP / toluene / 9 h / Heating

3: 72 percent / pyridine / CHCl₃ / 2.5 h / 60 °C

With pyridine; dmap; potassium tert-butylate; In tetrahydrofuran; chloroform; toluene; 1: Dieckmann condensation;

DOI:10.1016/S0040-4020(00)00955-8

upstream raw materials:

(2,4,6-trimethoxyphenyl)lead triacetate

4-benzyloxycarbonyl-6,7-dimethoxy-2H-1-benzopyran-3(4H)-one

4,5-dimethoxy-2-hydroxy phenylacetic acid

methyl (2-methoxycarbonylmethoxy-4,5-dimethoxyphenyl)acetate

Downstream raw materials:

6,7-dimethoxy-4-(2,4,6-trimethoxyphenyl)-2H-1-benzopyran-3(4H)-one