4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester

Base Information

• Chemical Name: 4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester
• CAS No.: 719288-17-2
• Molecular Formula: C₃₁H₃₅ClN₂O₅
• Molecular Weight: 551.082
• Mol file: 719288-17-2.mol

Synonyms:4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester

Chemical Property of 4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of 4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester

There total 4 articles about 4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl 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: 81.0%

1-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-bromo-ethanone (719288-16-1) + 1-t-Butoxycarbonylpiperazine (57260-71-6) → 4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester (719288-17-2)

Guidance literature:

With caesium carbonate; In N,N-dimethyl-formamide; at 20 ℃; for 2h;

DOI:10.1016/j.bmcl.2006.01.099

Reference yield:

1-[2,4-bis(benzyloxy)-5-chlorophenyl]ethan-1-one (705963-54-8) → 4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester (719288-17-2)

Guidance literature:

Multi-step reaction with 2 steps

1: 50 percent / PhMe₃N(+)*Br₃(-) / tetrahydrofuran / 2 h / 20 °C

2: 81 percent / Cs₂CO₃ / dimethylformamide / 2 h / 20 °C

With phenyltrimethylammonium tribromide; caesium carbonate; In tetrahydrofuran; N,N-dimethyl-formamide;

DOI:10.1016/j.bmcl.2006.01.099

Reference yield:

4-Chlororesorcinol (95-88-5) → 4-[2-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-oxo-ethyl]-piperazine-1-carboxylic acid tert-butyl ester (719288-17-2)

Guidance literature:

Multi-step reaction with 4 steps

1: 58 percent / BF₃*OEt₂ / 3.5 h / 90 °C

2: 90 percent / K₂CO₃ / acetonitrile / 6 h / Heating

3: 50 percent / PhMe₃N(+)*Br₃(-) / tetrahydrofuran / 2 h / 20 °C

4: 81 percent / Cs₂CO₃ / dimethylformamide / 2 h / 20 °C

With boron trifluoride diethyl etherate; phenyltrimethylammonium tribromide; potassium carbonate; caesium carbonate; In tetrahydrofuran; N,N-dimethyl-formamide; acetonitrile; 1: Friedel-Crafts acylation;

DOI:10.1016/j.bmcl.2006.01.099

upstream raw materials:

1-(2,4-bis-benzyloxy-5-chloro-phenyl)-2-bromo-ethanone

1-t-Butoxycarbonylpiperazine

1-[2,4-bis(benzyloxy)-5-chlorophenyl]ethan-1-one

4-Chlororesorcinol

Downstream raw materials:

4-[3-(2,4-bis-benzyloxy-5-chloro-phenyl)-1H-pyrazol-4-yl]-piperazine-1-carboxylic acid tert-butyl ester

4-[3-(5-chloro-2,4-dihydroxy-phenyl)-1H-pyrazol-4-yl]-piperazine-1-carboxylic acid tert-butyl ester

4-[3-(2,4-bis-benzyloxy-5-chloro-phenyl)-5-ethylcarbamoyl-1-(toluene-4-sulfonyl)-1H-pyrazol-4-yl]-piperazine-1-carboxylic acid tert-butyl ester

4-[3-(2,4-bis-benzyloxy-5-chloro-phenyl)-5-tert-butoxycarbonyl-1-(toluene-4-sulfonyl)-1H-pyrazol-4-yl]-piperazine-1-carboxylic acid tert-butyl ester