(+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

Base Information

• Chemical Name: (+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione
• CAS No.: 478659-40-4
• Molecular Formula: C₂₀H₁₇N₃O₂
• Molecular Weight: 331.374
• Mol file: 478659-40-4.mol

Synonyms:(+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

Chemical Property of (+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of (+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

There total 5 articles about (+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione 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: 65.0%

bis-(dimethylamino)methane (51-80-9) + (+)-(4S)-4-benzyl-2-methyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione (478659-23-3) → (+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione (478659-40-4)

Guidance literature:

With trifluoroacetic acid; In dichloromethane; at 65 ℃; for 3.5h;

DOI:10.1016/S0040-4020(02)00619-1

Reference yield:

N-tert-butoxycarbonyl-L-phenylalanine (13734-34-4) → (+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione (478659-40-4)

Guidance literature:

Multi-step reaction with 5 steps

1: 75 percent / 1-ethyl-3-(3'-dimethylaminopropyl)carbodiimide / CH₂Cl₂ / 20 °C

2: 80 percent / 4 h / 200 °C

3: 60 percent / sodium carbonate / CH₂Cl₂ / 20 °C

4: 97 percent / 3 h / 120 °C

5: 65 percent / trifluoroacetic acid / CH₂Cl₂ / 3.5 h / 65 °C

With sodium carbonate; N-(3-dimethylaminopropyl)-N-ethylcarbodiimide; trifluoroacetic acid; In dichloromethane; 5: Mannich reaction;

DOI:10.1016/S0040-4020(02)00619-1

Reference yield:

(-)-(3S)-3-benzyl-1-methyl-2,5-piperazinedione (59017-01-5) → (+)-(4S)-4-benzyl-2-methyl-1-methylene-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione (478659-40-4)

Guidance literature:

Multi-step reaction with 3 steps

1: 60 percent / sodium carbonate / CH₂Cl₂ / 20 °C

2: 97 percent / 3 h / 120 °C

3: 65 percent / trifluoroacetic acid / CH₂Cl₂ / 3.5 h / 65 °C

With sodium carbonate; trifluoroacetic acid; In dichloromethane; 3: Mannich reaction;

DOI:10.1016/S0040-4020(02)00619-1

upstream raw materials:

bis-(dimethylamino)methane

(+)-(4S)-4-benzyl-2-methyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-dione

N-tert-butoxycarbonyl-L-phenylalanine

(-)-(3S)-3-benzyl-1-methyl-2,5-piperazinedione