(3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one

Base Information

• Chemical Name: (3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one
• CAS No.: 116910-13-5
• Molecular Formula: C₁₆H₁₉NO₂
• Molecular Weight: 257.332
• Mol file: 116910-13-5.mol

Synonyms:(3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one

Chemical Property of (3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of (3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one

There total 2 articles about (3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-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: 70.0%

(S)-valinol (2026-48-4,473-75-6) + (E)-Methyl 4-oxo-2-phenyl-2-pentenoate (116910-20-4) → (3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one (116910-13-5)

Guidance literature:

In toluene; for 16h; Heating;

DOI:10.1021/ja00229a067

Reference yield:

methyl 2-oxo-2-phenylacetate (15206-55-0) → (3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one (116910-13-5)

Guidance literature:

Multi-step reaction with 2 steps

1: 83 percent / n-BuLi / tetrahydrofuran / -78 to 25 deg C

2: toluene / 16 h / Heating

With n-butyllithium; In tetrahydrofuran; toluene;

DOI:10.1016/S0040-4020(01)85604-0

Reference yield: 58.0%

(3S,7aR)-3-Isopropyl-7a-methyl-6-phenyl-2,3-dihydro-7aH-pyrrolo[2,1-b]oxazol-5-one (116910-13-5) + dimethylsulfoxonium methylide (70775-39-2,5367-24-8) → (1aR,1bR,4S,5aS)-4-Isopropyl-1b-methyl-5a-phenyl-hexahydro-2-oxa-4a-aza-cyclopropa[a]pentalen-5-one (116910-16-8) + (1aS,1bR,4S,5aR)-4-Isopropyl-1b-methyl-5a-phenyl-hexahydro-2-oxa-4a-aza-cyclopropa[a]pentalen-5-one (116910-16-8)

Guidance literature:

Yields of byproduct given;

DOI:10.1021/ja00229a067

upstream raw materials:

(S)-valinol

(E)-Methyl 4-oxo-2-phenyl-2-pentenoate

methyl 2-oxo-2-phenylacetate

Downstream raw materials:

(1aR,1bR,4S,5aS)-4-Isopropyl-1b-methyl-5a-phenyl-hexahydro-2-oxa-4a-aza-cyclopropa[a]pentalen-5-one

(1aS,1bR,4S,5aR)-4-Isopropyl-1b-methyl-5a-phenyl-hexahydro-2-oxa-4a-aza-cyclopropa[a]pentalen-5-one

(1S,2R)-2-Acetyl-1-phenyl-cyclopropanecarboxylic acid methyl ester