Synthesis of Phosphinopeptides via the Mannich Ligation
摘要:
Phosphinopeptides are a class of unnatural peptides containing a tetrahedral phosphorus atom and have potential for use as enzyme inhibitors. A series of phosphinopeptides were synthesized via the Mannich-type reaction of aryldichlorophosphines, aldehydes, and N-protected amino amides or peptide amides and subsequent aminolysis with amino esters or peptide esters. The current method named the Mannich ligation is an efficient route to synthesis of phosphinopeptides through convergent condensation.
Activation of carboxylic acids by pyrocarbonates. Application of di-tert-butyl pyrocarbonate as condensing reagent in the synthesis of amides of protected amino acids and peptides
作者:Vladimir F. Pozdnev
DOI:10.1016/0040-4039(95)01412-b
日期:1995.9
Amides formation from protected aminoacids and peptides was achieved in an easy and convenient one-pot procedure using di-tert-butyl pyrocarbonate as activating agent in the presence of pyridine and ammonium hydrogencarbonate. The method gave good yields and did not induce racemization during the amidation of urethane protected aminoacids.
Studies on Hepatic Agents. I. Synthesis of Aminoacyl (and Hydroxyacyl) Aminoacetonitriles
作者:SEIGO SUZUE、TUTOMU IRIKURA
DOI:10.1248/cpb.16.1417
日期:——
For the purpose of elucidating the structural relationship between lathyrism and inhibition of necrosis induced by CCl4 in the liver of the rat, many compounds related to aminoacetonitrile were synthesized. N-Aminoacylaminoacetonitriles (VIII, XIV) were synthesized from phthaloylaminoacylaminoacetonitriles. VIII were converted to 2-hydroxyimino-5-oxopiperazine derivatives (XV) and 5-oxo-2-thio-piperazines (XX). Preparations of N-(N-acylaminoacyl) aminoacetonitriles were also described. Further, N-α-hydroxyacylaminoacetonitriles were prepared from chloralides of α-hydroxyacids with aminoacetonitrile. In addition, XV (R=H) was converted to 2-acetamino-5-acetoxypyrazine by treatment with acetic anhydride.
Synthesis and Biological Evaluation of Analogues of the Antibiotic Pantocin B
作者:Amanda E. Sutton、Jon Clardy
DOI:10.1021/ja003770j
日期:2001.10.1
Strains of the bacteria Erwinia herbicola produce antibiotics that effectively control E. amylovora, the bacterial pathogen responsible for the plant disease fire blight. Pantocin B was the first of these antibiotics to be characterized, and a flexible synthesis of various analogues is reported. Embedded in the "pseudo-tripeptide" backbone of pantocin B are a methylenediamine and a methyl sulfone, both
Erwinia herbicola 细菌菌株产生的抗生素可有效控制梨火疫病菌,这是导致植物病火疫病的细菌病原体。Pantocin B 是第一个被表征的抗生素,据报道可以灵活地合成各种类似物。嵌在 pantocin B 的“伪三肽”骨架中的是亚甲二胺和甲基砜,这两种在天然产物中都具有不同寻常的结构特征。pantocin B 的肽性质促进了一系列构效关系研究,这些研究探索了这些官能团在决定 pantocin B 生物活性方面的作用。 明确区分抗生素 N 端和 C 端部分之间的作用作为构效关系研究的结果确定。N-末端 L-丙氨酰基是细胞输入所必需的,但与细胞内靶标(精氨酸生物合成酶 N-乙酰鸟氨酸氨基转移酶)相互作用时则不需要。发现亚甲二胺和甲基砜部分对抗生素活性至关重要,这可能是由于与 N-乙酰鸟氨酸氨基转移酶的广泛相互作用。
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.
Aldehyde components for use in four-component condensation (“4CC”) Ugi reaction peptide synthesis
作者:Charles F. Hoyng、Arvind D. Patel
DOI:10.1016/0040-4039(80)80142-0
日期:1980.1
The use of 9-formylfluorene as the aldehyde component in four-componentcondensation (4CC) fragment strategy peptidesynthesis has been investigated in the synthesis of model dipeptides.