The total synthesis and biological evaluation of nafuredin-γ and its analogues
摘要:
Nafuredin (1) is converted to nafuredin-gamma (2) under mild basic conditions and both compounds exhibit the same inhibitory activity and selectivity against NADH-fumarate reductase (complex 1). The total synthesis of 2 was achieved by a convergent approach using Stille coupling. The structural elements required for inhibitory activity against NADH-fumarate reductase (complex I) were then investigated by evaluation of nafuredin-gamma (2) and its structural analogues. (C) 2008 Elsevier Ltd. All rights reserved.
Total Synthesis of Nafuredin, a Selective NADH-fumarate Reductase Inhibitor
摘要:
Total synthesis of nafuredin, a selective NADH-fumarate reductase inhibitor, has been accomplished by a convergent approach. The C1-C8 and C9-C18 segments were derived efficiently from D-glucose and (S)-(-)-2-methyl-1-butanol, respectively, coupled by stereoselective Julia olefination, and converted to nafuredin.
Nafuredin, a new specific NADH-fumarate reductase inhibitor, was isolated from the culture broth of a fungal strain Aspergillusniger FT-0554. The stereoselective synthesis of three degradation products obtained by ozonolysis of nafuredin allowed elucidation of the absolute configuration of nafuredin.
A novel compound, nafuredin, was isolated as an inhibitor of anaerobic electron transport (NADH-fumarate reductase). It was obtained from culture broth of Aspergillus niger FT-0554 isolated from a marine sponge. The structure was elucidated as an epoxy-δ-lactone with an attached methylated olefinic side chain on the basis of spectral analysis.