From cyclic dehydrodipeptides to uncommon acyclic peptide mimetics
摘要:
1-Acetyl-3 -arylmethylene-2,5-piperazinediones gave N-3-arylpyruvylamino esters by acid-promoted alcoholysis under thermal conditions or microwave irradiation. Compounds obtained from 1-acetyl-3-(o-nitro)arylmethylene-2,5-piperazinediones gave, after reduction of the nitro group and spontaneous cyclization, N-2-indolylcarbonylamino acid derivatives. A similar alcoholysis/reduction sequence applied to dehydrodipeptides bearing a 3(4)-nitroaryl substituent gave N-3(4)-aminophenyi-alpha-ketopropionylamino acid derivatives. Coupling of the free amino group with Boc-protected amino acids gave tripeptide mimetics with a 6-aminoindole-2-carboxylic or a 3(4)-aminophenyl-alpha-ketopropionic acid as the second residue. (c) 2006 Elsevier Ltd. All rights reserved.
From cyclic dehydrodipeptides to uncommon acyclic peptide mimetics
摘要:
1-Acetyl-3 -arylmethylene-2,5-piperazinediones gave N-3-arylpyruvylamino esters by acid-promoted alcoholysis under thermal conditions or microwave irradiation. Compounds obtained from 1-acetyl-3-(o-nitro)arylmethylene-2,5-piperazinediones gave, after reduction of the nitro group and spontaneous cyclization, N-2-indolylcarbonylamino acid derivatives. A similar alcoholysis/reduction sequence applied to dehydrodipeptides bearing a 3(4)-nitroaryl substituent gave N-3(4)-aminophenyi-alpha-ketopropionylamino acid derivatives. Coupling of the free amino group with Boc-protected amino acids gave tripeptide mimetics with a 6-aminoindole-2-carboxylic or a 3(4)-aminophenyl-alpha-ketopropionic acid as the second residue. (c) 2006 Elsevier Ltd. All rights reserved.
Atom-efficient synthesis of 2,6-diazacyclophane compounds through alcoholysis/reduction of 3-nitroarylmethylene-2,5-piperazinediones
作者:Juan Francisco González、Elena de la Cuesta、Carmen Avendaño
DOI:10.1016/j.tet.2008.01.047
日期:2008.3
dehydrodipeptides are convenient starting materials for atom-efficient synthesis of different compounds. A one-pot ring-opening/alcoholysis/hydrolysis process with 3-nitroarylmethylene-2,5-piperazinediones yielded N-3-nitroarylpyruvoylamino esters, which gave the corresponding amines by reduction of the nitro group. In the case of 2-nitroaryl compounds, an intramolecular reductive amination afforded
From cyclic dehydrodipeptides to uncommon acyclic peptide mimetics
作者:Juan Francisco González、Elena de la Cuesta、Carmen Avendaño
DOI:10.1016/j.tetlet.2006.07.095
日期:2006.9
1-Acetyl-3 -arylmethylene-2,5-piperazinediones gave N-3-arylpyruvylamino esters by acid-promoted alcoholysis under thermal conditions or microwave irradiation. Compounds obtained from 1-acetyl-3-(o-nitro)arylmethylene-2,5-piperazinediones gave, after reduction of the nitro group and spontaneous cyclization, N-2-indolylcarbonylamino acid derivatives. A similar alcoholysis/reduction sequence applied to dehydrodipeptides bearing a 3(4)-nitroaryl substituent gave N-3(4)-aminophenyi-alpha-ketopropionylamino acid derivatives. Coupling of the free amino group with Boc-protected amino acids gave tripeptide mimetics with a 6-aminoindole-2-carboxylic or a 3(4)-aminophenyl-alpha-ketopropionic acid as the second residue. (c) 2006 Elsevier Ltd. All rights reserved.