161891-81-2Relevant academic research and scientific papers
Enantioselective organocatalytic conjugate reduction of β-AzoleContaining α,β-unsaturated aldehydes
Hoffman, Thomas J.,Dash, Jyotirmayee,Rlgby, James H.,Arseniyadis, Stelllos,Cossy, Janine
supporting information; experimental part, p. 2756 - 2759 (2009/11/30)
β-Azole-contalnlng α,β-unsaturated aldehydes were successfully reduced under highly enantloselectlve organocatalytlc transfer hydrogenation conditions. The products were obtained In good yields and up to 94% optical purity. This simple process was success
Synthesis of the penta-oxazole core of telomestatin in a convergent approach to poly-oxazole macrocycles
Marson, Charles M.,Saadi, Mona
, p. 3892 - 3893 (2008/09/18)
The synthesis of the penta-oxazole core of telomestatin whose methyl derivative could be an advanced intermediate in its total synthesis by subsequent condensation with a suitably substituted oxazole was investigated. The biosynthesis of telomestatin was interpreted as a formal assembly of one cysteine, five serine, and two threonine sub-units. The successive use of amines bearing unprotected hydroxymethyl groups permitted iterative assembly of polyoxazoles without the need for repeated protection and deprotection. It also permitted regioselective introduction of substituents at the 5-position of one or more oxazole rings and a variety of analogues to probe telomerase function. The synthetic route also provided several linked polyoxazole systems of increasing complexity and derived from serine as the only amino acid.
Useful synthesis of the main dehydrohexapeptide segment of a macrocyclic antibiotic, berninamycin B
Yamada, Takahiro,Okumura, Kazuo,Yonezawa, Yasuchika,Shin, Chung-Gi
, p. 102 - 103 (2007/10/03)
The useful synthesis of tetradehydrohexapeptide segment 2, which is the main skeleton of a macrocyclic antibiotic, berninamycin B, was first achieved. The skeleton 2 is constructed, in turn, of 2-[(Z)-1-amino-1-propenyl]-5-methyl-oxazole-4-carboxylic acid, α-dehydroalanine (ΔAla), L-Val, 2-[1-amino-1-ethenyl]-5-methyloxazole-4-carboxylic acid residues, besides L-Thr and ΔAla at the N- and C-termini, respectively.
A Convenient Synthesis of Methyl 2-thazoline-4-carboxylate, an Important Skeleton of Cyclothiazomycin
Shin, Chung-gi,Ito, Akio,Okumura, Kazuo,Nakamura, Yutaka
, p. 45 - 46 (2007/10/02)
The convenient syntheses of a few methyl 2-(1-amino)alkenyl thiazoline-4-carboxylates and methyl 2-thiazoline-4-carboxylate have been accomplished.The latter is an important portial skeleton of macrobicyclic peptide antibiotic cyclothiazomycin.
