Biosynthesis of β-(1,2,4-triazol-1-yl)alanine in higher plants
作者:Fumio Ikegami、Yumiko Komada、Masuko Kobori、Douglas R. Hawkins、Isamu Murakoshi
DOI:10.1016/0031-9422(90)85176-g
日期:1990.1
4-triazol-1-yl)Alanine, an important metabolite of the triazole-based fungicide Myclobutanil, was shown to be derived from O-acetyl- l -serine and 1,2,4-triazole by cysteine synthase in higherplants. Some properties of this enzyme in the biosynthesis of β-(1,2,4-triazol-1-yl)alanine are described.
O-Acetyl-l-serine sulfhydrylase (OASS) from plants and bacteria synthesizes cysteine and unnatural amino acids that are important building blocks for active pharmaceuticals and agrochemicals. A the...
Efficient chemoenzymatic synthesis of enantiomerically pure β-heterocyclic amino acid derivatives
作者:Valérie Rolland-Fulcrand、Nicolas Haroune、Maire Louise Roumestant、Jean Martinez
DOI:10.1016/s0957-4166(00)00463-8
日期:2000.12
Enantiomerically pure (S)-pyrazolylalanine and its derivatives are nonproteinogenic amino acids with antidiabetic activity. A short and effective enantioselective synthesis of these compounds is described, using a kinetic resolution by an acylase from Aspergillus sp. (C) 2001 Elsevier Science Ltd. Ail rights reserved.
Discovery of Novel Spiro[3<i>H</i>-indole-3,2′-pyrrolidin]-2(1<i>H</i>)-one Compounds as Chemically Stable and Orally Active Inhibitors of the MDM2–p53 Interaction
Scaffold modification based on Wang’s pioneering MDM2–p53 inhibitors led to novel, chemically stable spiro-oxindole compounds bearing a spiro[3H-indole-3,2′-pyrrolidin]-2(1H)-one scaffold that are not prone to epimerization as observed for the initial spiro[3H-indole-3,3′-pyrrolidin]-2(1H)-one scaffold. Further structure-based optimization inspired by natural product architectures led to a complex