(2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

Base Information

• Chemical Name: (2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester
• CAS No.: 138058-65-8
• Molecular Formula: C₂₂H₂₇NO₄
• Molecular Weight: 369.461
• Mol file: 138058-65-8.mol

Synonyms:(2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

Chemical Property of (2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of (2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

There total 5 articles about (2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-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: 76.0%

(2R,4S,5R)-2-((R)-1-Methoxycarbonyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester (138058-72-7) → (2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester (138058-65-8)

Guidance literature:

With lithium borohydride; In methanol; diethyl ether; for 2h; Heating;

DOI:10.1016/S0040-4020(01)81947-5

Reference yield:

(1R,2S)-norephedrine (492-41-1,58550-13-3,757124-50-8) → (2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester (138058-65-8)

Guidance literature:

Multi-step reaction with 5 steps

1: 95 percent / 2M NaOH / H₂O / Ambient temperature

2: 2) pyridinium tosylate / 1) benzene, reflux, 10 h, 2) reflux, 6 h

3: 57 percent / TiCl₄ / CH₂Cl₂ / 15 h / -20 °C

4: 65 percent / Na₂HPO₄, AgOTf / tetrahydrofuran / 3 h / Heating

5: 76 percent / LiBH₄ / diethyl ether; methanol / 2 h / Heating

With sodium hydroxide; disodium hydrogenphosphate; lithium borohydride; silver trifluoromethanesulfonate; titanium tetrachloride; pyridinium p-toluenesulfonate; In tetrahydrofuran; methanol; diethyl ether; dichloromethane; water;

DOI:10.1016/S0040-4020(01)81947-5

Reference yield:

(1R,2S)-1-phenyl-2-benzyloxycarbonylamino-1-propanol (104863-92-5) → (2R,4S,5R)-2-((S)-2-Hydroxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester (138058-65-8)

Guidance literature:

Multi-step reaction with 4 steps

1: 2) pyridinium tosylate / 1) benzene, reflux, 10 h, 2) reflux, 6 h

2: 57 percent / TiCl₄ / CH₂Cl₂ / 15 h / -20 °C

3: 65 percent / Na₂HPO₄, AgOTf / tetrahydrofuran / 3 h / Heating

4: 76 percent / LiBH₄ / diethyl ether; methanol / 2 h / Heating

With disodium hydrogenphosphate; lithium borohydride; silver trifluoromethanesulfonate; titanium tetrachloride; pyridinium p-toluenesulfonate; In tetrahydrofuran; methanol; diethyl ether; dichloromethane;

DOI:10.1016/S0040-4020(01)81947-5

upstream raw materials:

(2R,4S,5R)-2-((R)-1-Methoxycarbonyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

(1R,2S)-norephedrine

(1R,2S)-1-phenyl-2-benzyloxycarbonylamino-1-propanol

(4S,5R)-2-Methoxy-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

Downstream raw materials:

(2R,4S,5R)-2-((S)-2-Benzyloxy-1-methyl-ethyl)-2,4-dimethyl-5-phenyl-oxazolidine-3-carboxylic acid benzyl ester

(S)-4-benzyloxy-3-methyl-2-butanone

(-)-(R)-4-benzyloxy-3-methylbutan-2-one