58944-73-3Relevant academic research and scientific papers
Synthesis of Sinefungin and Its C-6' Epimer
Geze, M.,Blanchard, P.,Fourrey, J. L.,Robert-Gero, M.
, p. 7638 - 7640 (1983)
A synthesis of the nucleoside antibiotic sinefungin (1) and its C-6' epimer is described.It was accomplished by coupling a functionized adenosine derivative, 2, with an aldehyde synthon, 3, derived from L-amino acid to give the sinefungin precursor 4.The construction of the skeleton of the glycosyl moiety of sinefungin (1) could be achieved starting from methyl riboside.The adopted sequence was probed further by synthesizing the sinefungin analogue 9b (two C-6' epimers).This synthesis established that the Hoffmann rearrangement of both amides 8b took place with complete retention of configuration at C-6'.Finally, sinefungin derivatives 9c were obtained, and one of these found to be identical with the same derivative prepared from authentic sinefungin (1).It was easily converted to sinefungin (1).
Total synthesis of (+)-sinefungin
Ghosh, Arun K.,Liu, Wenming
, p. 6175 - 6182 (2007/10/03)
Sinefungin (1) a nucleoside antibiotic isolated from Streptomyces has been synthesized from D-ribose. Both the C-6 and C-9 stereogenic centers were constructed by efficient asymmetric syntheses. The C-6 amine stereochemistry was set by a highly diastereoselective allylation (> 99% de) of a (1S,2R)-1-amino-2-indanol-derived oxazolidinone 9 followed by a Curtius rearrangement of 11 to 12. The C-9 amino acid stereochemistry of sinefungin (1) was established by a rhodium chiral bisphosphine-catalyzed asymmetric hydrogenation of an α-(acylamino)acrylate derivative. The anomeric adenosylation of the mixture of anomeric acetates 20 in the presence of C-6 urethane NH was found to be extremely difficult. Conversion of the C-6 urethane NH as its N-benzyl derivative 21 was necessary prior to the adenosylation reaction. Successful adenosylation was effectively carried out by Vorbruggen's protocol utilizing persilylated N6-benzoyladenine and trimethylsilyl triflate.
Expedient Synthesis of Natural (S)-Sinefungin and of its C-6' Epimer
Barton, Derek H. R.,Gero, Stephane D.,Quiclet-Sire, Beatrice,Samadi, Mohammed
, p. 981 - 985 (2007/10/02)
Sinefungin 1a and 6-epi-sinefungin 1b have been prepared from adenosine and L-aspartic acid.The key step in the synthesis was the coupling of the radical derived from 14 with the unsaturated amide 13.The latter was obtained by a radical reaction from L-as
Stereoselective Synthesis and Absolute Stereochemistry of Sinefungin
Maguire, Martin P.,Feldman, Paul L.,Rapoport, Henry
, p. 948 - 955 (2007/10/02)
Sinefungin has been synthesized from D-ribose, L-ornithine, and adenine.L-Ornithine was converted to its δ-nitro analogue 10, which was coupled to the ribose derived aldehyde 11 by a potassium fluoride catalyzed nitro-aldol reaction.The resulting nitro al
