(R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one

Base Information

• Chemical Name: (R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one
• CAS No.: 330151-69-4
• Molecular Formula: C₂₃H₂₂O₆
• Molecular Weight: 394.424
• Mol file: 330151-69-4.mol

Synonyms:(R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one

Chemical Property of (R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of (R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one

There total 3 articles about (R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-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: 27.0%

(R)-5,6-dihydro-4-methoxy-6-methyl-2H-pyran-2-one (221356-83-8) + methyl 2-benzyloxymethoxy-4-methoxy-6-methylbenzoate (330151-68-3) → (R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one (330151-69-4)

Guidance literature:

methyl 2-benzyloxymethoxy-4-methoxy-6-methylbenzoate; With lithium diisopropyl amide; In tetrahydrofuran; at -78 ℃; for 0.25h;

(R)-5,6-dihydro-4-methoxy-6-methyl-2H-pyran-2-one; In tetrahydrofuran; at -78 ℃; for 0.25h;

With ethanol; In tetrahydrofuran; at -78 - 20 ℃;

DOI:10.1002/1099-0690(200101)2001:1<211::aid-ejoc211>3.3.co;2-i

Reference yield:

Benzyloxymethyl chloride (3587-60-8) → (R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one (330151-69-4)

Guidance literature:

Multi-step reaction with 2 steps

1.1: NaOMe / methanol

1.2: 93 percent / Et₃N / tetrahydrofuran

2.1: 2 M LDA / tetrahydrofuran / 0.25 h / -78 °C

2.2: tetrahydrofuran / 0.25 h / -78 °C

2.3: 27 percent / EtOH / tetrahydrofuran / -78 - 20 °C

With sodium methylate; lithium diisopropyl amide; In tetrahydrofuran; methanol;

DOI:10.1002/1099-0690(200101)2001:1<211::aid-ejoc211>3.3.co;2-i

Reference yield:

2-hydroxy-4-methoxy-6-methyl-benzoic acid methyl ester (520-43-4) → (R)-9-benzyloxymethoxy-3,4-dihydro-10-hydroxy-7-methoxy-3-methyl-1H-naphtho[2,3-c]pyran-1-one (330151-69-4)

Guidance literature:

Multi-step reaction with 2 steps

1.1: NaOMe / methanol

1.2: 93 percent / Et₃N / tetrahydrofuran

2.1: 2 M LDA / tetrahydrofuran / 0.25 h / -78 °C

2.2: tetrahydrofuran / 0.25 h / -78 °C

2.3: 27 percent / EtOH / tetrahydrofuran / -78 - 20 °C

With sodium methylate; lithium diisopropyl amide; In tetrahydrofuran; methanol;

DOI:10.1002/1099-0690(200101)2001:1<211::aid-ejoc211>3.3.co;2-i

upstream raw materials:

(R)-5,6-dihydro-4-methoxy-6-methyl-2H-pyran-2-one

methyl 2-benzyloxymethoxy-4-methoxy-6-methylbenzoate

Benzyloxymethyl chloride

2-hydroxy-4-methoxy-6-methyl-benzoic acid methyl ester

Downstream raw materials:

(+)-semivioxanthin