Synthesis of chiral non-racemic 3-(dioxopiperazin-2-yl)propionic acid derivatives
摘要:
Starting with the proteinogenic amino acid (S)-glutamate (3) a facile, high yielding synthesis of the chiral non-racemic 3-(dioxo-piperazin-2-yl)propionates 6, 11, and 14 is presented. Key intermediates in the synthesis of Ne-benzyl substituted (dioxopiperazin-2-yl)propionates 11 and 14 are the N-monobenzylglutamate 8 and the chloroacetamide 12, which allow introduction of various substituents in position 4 of the piperazine ring. In receptor binding studies with radioligands the 3-(piperazin-2-yl)propanol 15 was found to have promising affinity for sigma(1)-receptors (K-i=66.1 nM). (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of chiral non-racemic 3-(dioxopiperazin-2-yl)propionic acid derivatives
摘要:
Starting with the proteinogenic amino acid (S)-glutamate (3) a facile, high yielding synthesis of the chiral non-racemic 3-(dioxo-piperazin-2-yl)propionates 6, 11, and 14 is presented. Key intermediates in the synthesis of Ne-benzyl substituted (dioxopiperazin-2-yl)propionates 11 and 14 are the N-monobenzylglutamate 8 and the chloroacetamide 12, which allow introduction of various substituents in position 4 of the piperazine ring. In receptor binding studies with radioligands the 3-(piperazin-2-yl)propanol 15 was found to have promising affinity for sigma(1)-receptors (K-i=66.1 nM). (C) 2002 Elsevier Science Ltd. All rights reserved.
Bromelain Catalyzed Synthesis of Peptides in Organic Solvent
作者:Dar-Fu Tai、Shu-Lin Fu
DOI:10.1002/jccs.200300025
日期:2003.2
exported by Taiwan. There is no deficiency for thesource of this enzyme. Therefore, the application of bro-melain to catalyze the synthesis of peptides has great poten-tial and economic value.No research effort has ever been made in peptide syn-thesis using bromelain except for catalyzing polymerizationin aqueous solution.
Synthesis of chiral non-racemic 3-(dioxopiperazin-2-yl)propionic acid derivatives
作者:Manuela Weigl、Bernhard Wünsch
DOI:10.1016/s0040-4020(01)01212-1
日期:2002.2
Starting with the proteinogenic amino acid (S)-glutamate (3) a facile, high yielding synthesis of the chiral non-racemic 3-(dioxo-piperazin-2-yl)propionates 6, 11, and 14 is presented. Key intermediates in the synthesis of Ne-benzyl substituted (dioxopiperazin-2-yl)propionates 11 and 14 are the N-monobenzylglutamate 8 and the chloroacetamide 12, which allow introduction of various substituents in position 4 of the piperazine ring. In receptor binding studies with radioligands the 3-(piperazin-2-yl)propanol 15 was found to have promising affinity for sigma(1)-receptors (K-i=66.1 nM). (C) 2002 Elsevier Science Ltd. All rights reserved.