Design, synthesis and biological evaluation of novel L-isoserine tripeptide derivatives as aminopeptidase N inhibitors
摘要:
Aminopeptidase N (APN/CD13) is one of the essential proteins for tumour invasion, angiogenesis and metastasis as it is over-expressed on the surface of different tumour cells. Based on our previous work that L-isoserine dipeptide derivatives were potent APN inhibitors, we designed and synthesized L-isoserine tripeptide derivatives as APN inhibitors. Among these compounds, one compound 16l (IC50 = 2.51 +/- 0.2 +/- mu M) showed similar inhibitory effect compared with control compound Bestatin (IC50 = 6.25 +/- 0.4 mu M) and it could be used as novel lead compound for the APN inhibitors development as anticancer agents in the future.
Efficient synthesis of 2,5-diketopiperazines using microwave assisted heating
作者:Marcus Tullberg、Morten Grøtli、Kristina Luthman
DOI:10.1016/j.tet.2006.05.010
日期:2006.7
In this study a general, efficient and environmentally benign solution phase synthesis of 2,5-diketopiperazines (DKPs) using microwave assisted heating in water is described. A series of 11 structurally different DKPs have been synthesized from dipeptide methyl esters. A range of common laboratory solvents have been tested as well as different reaction times and temperatures. Both classic thermal and
4‐Dihydroxyphenylalanine (DOPA)‐containing peptides and proteins provide attractive design paradigms for pharmaceutical applications and engineering of synthetic polymers. An efficient and selective route to DOPApeptides by oxidation of L‐tyrosine derivatives with tyrosinase is reported. The efficiency of the procedure was tested by using successively recycled tyrosinaseimmobilized on Eupergit®C250L and
Studies of selective Boc removal in the presence of silyl ethers
作者:Florine Cavelier、Christine Enjalbal
DOI:10.1016/0040-4039(96)01070-2
日期:1996.7
The selectiveremoval of N-Boc protection can be obtained in the presence of either TBDMS or TBDPS ethers. On the basis of promising results from the literature, we first tried sonication, that failed, whereas the exclusive cleavage of the Boc group was successfully achieved by a saturated solution of HCl in ethyl acetate.
Effect of the 4′-substituted phenylalanine moiety of sansalvamide A peptide on antitumor activity
作者:Shouxin Liu、Yihua Yang、Cuiran Zhao、Jing Huang、Chunyu Han、Jianrong Han
DOI:10.1039/c3md00294b
日期:——
Eight sansalvamide A peptide analogues with 4â²-fluoride, 4â²-chloride, 4â²-bromide, 4â²-iodide, and 4â²-methoxyphenylalanine moieties were synthesized. The effect of these para-substitutions of sansalvamide A peptide on their cytotoxicity was evaluated using HCT-116, MDA-MB-231, HT-29, HCT-15, K562, HeLa, and A549 cell lines. The 4â²-methoxyphenylalanine analog of sansalvamide A peptide was found to be a promising antitumor agent.
合成了8种具有4'²-氟、4'²-氯、4'²-溴、4'²-碘和4'²-甲氧基苯丙氨酸分子的山沙酰胺A肽类似物。研究人员使用 HCT-116、MDA-MB-231、HT-29、HCT-15、K562、HeLa 和 A549 细胞系评估了山沙酰胺 A 肽的这些对位取代对其细胞毒性的影响。结果发现,4²-甲氧基苯丙氨酸类似物丹沙酰胺 A肽是一种很有前景的抗肿瘤药物。
Über Peptidsynthesen, XXXV1) Cyclisierung mit einer verbesserten Anhydrid-Methode
作者:Theodor Wieland、Jürgen Faesel、Heinz Faulstich
DOI:10.1002/jlac.19687130125
日期:1968.5.22
Die Einstufen-Cyclisierung mit Äthylkohlensäurechlorid gelingt in Gegenwart von Pyridinhydrochlorid am Pentapeptid L-Trp-Gly-L-Leu-L-Ala-D-Thr (1a) mit ca. 30% und am Secoketophalloidin (1b) mit 15% d. Th., während ohne Zusatz von Pyridin-hydrochlorid nur 8 bzw. 6% d. Th. erzielt werden. Das Einstufenreagens Di-[2.4-dinitro-phenyl]-carbonat läßt aus dem Pentapeptid 1a 13.5% d. Th. an Cyclopeptid 3a