(-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate

Base Information

• Chemical Name: (-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate
• CAS No.: 310904-19-9
• Molecular Formula: C₃₆H₅₄N₂O₈
• Molecular Weight: 642.833
• Mol file: 310904-19-9.mol

Synonyms:(-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate

Chemical Property of (-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate

Chemical Property:

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

Technology Process of (-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate

There total 4 articles about (-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate 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: 66.0%

2-benzyl 3,4-diethyl-1H-pyrrole-2-carboxylate (147590-65-6) + (S)-2-[bis(tert-butoxycarbonyl)amino]-6-iodohexanoic acid tert-butyl ester (257883-70-8) → (-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate (310904-19-9)

Guidance literature:

With 18-crown-6 ether; potassium tert-butylate; In tetrahydrofuran; for 7h;

DOI:10.1021/jo0008901

Reference yield:

benzyl 2-cyanoacetate (14447-18-8) → (-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate (310904-19-9)

Guidance literature:

Multi-step reaction with 2 steps

1: 72 percent / DBU / tetrahydrofuran

2: 66 percent / 18-crown-6; t-BuOK / tetrahydrofuran / 7 h

With 18-crown-6 ether; potassium tert-butylate; 1,8-diazabicyclo[5.4.0]undec-7-ene; In tetrahydrofuran;

DOI:10.1021/jo0008901

Reference yield:

(S)-(-)-1-tert-butyl-2--5-hexenoate (226985-05-3) → (-)-benzyl-1-[(5S)-5-[bis(tert-butylcarbonyl)amino]-6-(tert-butoxy)-6-oxohexyl]-3,4-diethyl-1H-pyrrole-2-carboxylate (310904-19-9)

Guidance literature:

Multi-step reaction with 3 steps

1.1: B₂H₆*THF / tetrahydrofuran / 17 h / 202 °C

1.2: 87 percent / aq. NaOH; aq. H₂O₂ / 0.5 h

2.1: 92 percent / PPh₃; imidazole; I₂ / tetrahydrofuran / 1 h / 20 °C

3.1: 66 percent / 18-crown-6; t-BuOK / tetrahydrofuran / 7 h

With 1H-imidazole; 18-crown-6 ether; B₂H₆-THF; potassium tert-butylate; iodine; triphenylphosphine; In tetrahydrofuran;

DOI:10.1021/jo0008901

upstream raw materials:

2-benzyl 3,4-diethyl-1H-pyrrole-2-carboxylate

(S)-2-[bis(tert-butoxycarbonyl)amino]-6-iodohexanoic acid tert-butyl ester

benzyl 2-cyanoacetate

(S)-(-)-1-tert-butyl-2--5-hexenoate