259799-91-2Relevant academic research and scientific papers
Termination of the structural confusion between plipastatin A1 and fengycin IX
Honma, Miho,Tanaka, Kazuaki,Konno, Katsuhiro,Tsuge, Kenji,Okuno, Toshikatsu,Hashimoto, Masaru
, p. 3793 - 3798 (2012/08/28)
Plipastatin A1 and fengycin IX were experimentally proven to be identical compounds, while these had been considered as diastereomers due to the permutation of the enantiomeric pair of Tyr in most papers. The 1H NMR spectrum changed to become quite similar to that of plipastatin A1, when the sample which provided resembled spectrum of fengycin IX was treated with KOAc followed by LH-20 gel filtration. Our structural investigations disclosed that the structures of these molecules should be settled into that of plipastatin A1 by Umezawa (l-Tyr4 and d-Tyr10).
An efficient method to chiral β-hydroxy acids: Synthesis of lipid-A side chain
Nandanan,Phukan, Prodeep,Sudalai
, p. 893 - 896 (2007/10/03)
The synthesis of optically active β-hydroxy acids 5a-c is achieved in four steps from their corresponding terminal olefins 1a-c by employing Sharpless asymmetric dihydroxylation. The regioselective ring opening of chiral cyclic sulfites 3a-c with cyanide ion, constitutes the key reaction, thus producing the hydroxy nitriles 4a-c.
