β-Phenylselenoalanine as a dehydroalanine precursor–efficient synthesis of alternariolide (AM-toxin I)
摘要:
Alternariolide (AM-toxin) is synthesized in 44% overall yield from L-2-amino-5-(4-methoxyphenyl)pentanoic acid; D-beta-phenylselenoalanine is used as the dehydroalanine precursor.
A photoaffinity-labelinganalog of alternariolide (AM-toxin I) which contains L-2-amino-5-[4-(1-azi-2,2,2-trifluoro)ethylphenyl]pentanoic acid (10) was synthesized.
A new fluorescent amino acid, L-2-amino-5-(10-methoxy-9-anthryl)pentanoic acid (L-Amap, 3) was synthesized and incorporated into alternariolide instead of L-Amp (L-2-amino-5-(4-methoxyphenyl)-pentanoic acid.
Synthetic Studies on Thiostrepton: Construction of Thiostrepton Analogues with the Thiazoline-Containing Macrocycle
作者:K. C. Nicolaou、Marta Nevalainen、Mark Zak、Stephan Bulat、Marco Bella、Brian S. Safina
DOI:10.1002/anie.200351745
日期:2003.7.28
Conversion of Nocathiacin I to Nocathiacin Acid by a Mild and Selective Cleavage of Dehydroalanine
作者:Libo Xu、Amy K. Farthing、Yao-Jun Shi、Peter T. Meinke、Kun Liu
DOI:10.1021/jo071115p
日期:2007.9.1
[GRAPHICS]Thiazolyl peptide antibiotic: nocathiacin 1 (1) was converted to nocathiacin acid (4) in high yield by treatment with trifluoroacetic anhydride and pyridine in THF at room temperature. Two equipotent water-soluble amide analogues of nocathiacin I were readily prepared from this important and versatile carboxylic acid intermediate under mild peptide coupling conditions. The present method is useful for chemical derivatization of complex natural products that contain C-terminal dehydroalanine.