(3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester

Base Information

• Chemical Name: (3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester
• CAS No.: 300676-92-0
• Molecular Formula: C₂₀H₂₁NO₄
• Molecular Weight: 339.391
• Mol file: 300676-92-0.mol

Synonyms:(3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester

Chemical Property of (3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of (3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester

There total 7 articles about (3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester 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: 53.0%

(2R,3S)-2-((S)-1-Hydroxy-allyl)-3-(2-hydroxy-ethyl)-5-methoxy-3-methyl-2,3-dihydro-indole-1-carboxylic acid benzyl ester (300676-91-9) → (3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester (300676-92-0)

Guidance literature:

With lead(IV) acetate; In benzene; at 20 ℃;

DOI:10.1021/ol006065o

Reference yield:

4-methoxyphenylhydrazine hydrochloride (19501-58-7) → (3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester (300676-92-0)

Guidance literature:

Multi-step reaction with 7 steps

1: 70 percent / pyridine; H₂O / 2.5 h / Heating

2: LiAlH₄ / tetrahydrofuran / 0 °C

3: aq. K₂CO₃

4: 89 percent / TBAF / tetrahydrofuran

5: 97 percent / Zn; AcOH / ethanol / Heating

6: 93 percent / NaBH₄ / ethanol

7: 53 percent / Pb(OAc)4 / benzene / 20 °C

With lead(IV) acetate; sodium tetrahydroborate; lithium aluminium tetrahydride; tetrabutyl ammonium fluoride; potassium carbonate; acetic acid; zinc; In tetrahydrofuran; pyridine; ethanol; water; benzene; 1: <3,3>-sigmatropic rearrangement; cyclization / 2: Reduction / 3: Condensation / 4: Hydrolysis / 5: reductive cleavage / 6: Reduction / 7: Cyclization;

DOI:10.1021/ol006065o

Reference yield:

3-hydroxy-6-methoxy-4a-methyl-1-vinyl-3,4,4a,9a-tetrahydro-1H-pyrano[3,4-b]indole-9-carboxylic acid benzyl ester (300676-90-8) → (3aS,8aS)-5-Methoxy-3a-methyl-2,3,3a,8a-tetrahydro-furo[2,3-b]indole-8-carboxylic acid benzyl ester (300676-92-0)

Guidance literature:

Multi-step reaction with 2 steps

1: 93 percent / NaBH₄ / ethanol

2: 53 percent / Pb(OAc)4 / benzene / 20 °C

With lead(IV) acetate; sodium tetrahydroborate; In ethanol; benzene; 1: Reduction / 2: Cyclization;

DOI:10.1021/ol006065o

upstream raw materials:

(2R,3S)-2-((S)-1-Hydroxy-allyl)-3-(2-hydroxy-ethyl)-5-methoxy-3-methyl-2,3-dihydro-indole-1-carboxylic acid benzyl ester

4-methoxyphenylhydrazine hydrochloride

3-hydroxy-6-methoxy-4a-methyl-1-vinyl-3,4,4a,9a-tetrahydro-1H-pyrano[3,4-b]indole-9-carboxylic acid benzyl ester

C₂₁H₃₃NO₅Si