(1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal

Base Information

• Chemical Name: (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal
• CAS No.: 481656-21-7
• Molecular Formula: C₂₃H₃₂O₃
• Molecular Weight: 356.505
• Mol file: 481656-21-7.mol

Synonyms:(1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal

Chemical Property of (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal

There total 3 articles about (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal 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: 89.0%

Methyltriphenylphosphonium bromide (1779-49-3) + (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-1,4,4a,7,8,8aα-hexahydronaphthalene-2,5(3H,7H)-dione-5-ethyleneacetal (481656-19-3) → (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal (481656-21-7)

Guidance literature:

Methyltriphenylphosphonium bromide; With potassium tert-butylate; In benzene; for 2h; Inert atmosphere; Reflux;

(1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-1,4,4a,7,8,8aα-hexahydronaphthalene-2,5(3H,7H)-dione-5-ethyleneacetal; In benzene; for 12h; Inert atmosphere; Reflux;

DOI:10.1002/ejoc.201100173

Reference yield:

o-Methoxybenzyl bromide (52289-93-7) → (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal (481656-21-7)

Guidance literature:

Multi-step reaction with 2 steps

1: 72 percent / Li; liq. NH₃ / tetrahydrofuran

2: 86 percent / t-BuOK / benzene / Heating

With potassium tert-butylate; ammonia; lithium; In tetrahydrofuran; benzene;

Reference yield:

(4aS)-1,4aβ-dimethyl-4,4a,7,8-tetrahydronaphthalene-2,5(3H,6H)-dione-5-ethyeneacetal (26742-33-6) → (1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-2-methylene-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-5(6H)-one-5-ethyleneacetal (481656-21-7)

Guidance literature:

Multi-step reaction with 2 steps

1: 72 percent / Li; liq. NH₃ / tetrahydrofuran

2: 86 percent / t-BuOK / benzene / Heating

With potassium tert-butylate; ammonia; lithium; In tetrahydrofuran; benzene;

upstream raw materials:

Methyltriphenylphosphonium bromide

(1S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,4aβ-dimethyl-1,4,4a,7,8,8aα-hexahydronaphthalene-2,5(3H,7H)-dione-5-ethyleneacetal

(4aS)-1,4aβ-dimethyl-4,4a,7,8-tetrahydronaphthalene-2,5(3H,6H)-dione-5-ethyeneacetal

o-Methoxybenzyl bromide

Downstream raw materials:

(1R,2S,4aS,5R,6S,8aS)-2-[(5β,6β-epoxy-1β,2β,4aβ,5α-tetramethyl-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-1-yl)methyl]phenol

(1R,2S,4aS,5S,6R,8aS)-2-[(5α,6α-epoxy-1β,2β,4aβ,5α-tetramethyl-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-1-yl)-methyl]phenol

(1R,2S,4aS,8aR)-2-[(1β,2β,4aβ,5-tetramethyl-1,2,3,4,4a,7,8,8aα-octahydronaphthalene-1-yl)methyl]phenol

(1S,2S,4aS,8aR)-1α-(2-methoxybenzyl)-1β,2β,4aβ,5-tetramethyl-1,2,3,4,4a,7,8,8aα-octahydronaphthalene