70606-00-7Relevant academic research and scientific papers
Unexpected stereochemistry in the lithium salt catalyzed ring expansion of nonracemic oxaspiropentanes. Formal syntheses of (-)-(4R,5R)-muricatacin and the pheromone (R)-japonilure
Bernard, Angela M.,Frongia, Angelo,Piras, Pier P.,Secci, Francesco
, p. 2923 - 2926 (2003)
(Matrix presented) The stereochemistry of the cyclobutanones 3, obtained by lithium salt catalyzed ring expansion of the optically pure oxaspiropentanes 2, depends not only on the lithium salt but also on the stereochemistry of 2. They constitute the starting material for the syntheses of the acetogenin (-)-(4R, SR)-muricatacin and the pheromone (R)-japonilure.
First total synthesis of the marine natural products clavulolactones II and III
Miller, Charlotte M.,Benneche, Tore,Tius, Marcus A.
, p. 4051 - 4058 (2015)
The first total synthesis of the marine prostanoids clavulolactones II and III is presented from an easily accessible chiral, non-racemic cyclopentenone intermediate. Key steps involve selective TBDMS deprotection, selective reduction of the β-side chain and aldol condensation. Clavulolactones II and III were successfully prepared from (S)-4-((tert-butyldimethylsilyl)oxy) cyclopent-2-en-1-one over nine steps, in overall yields of 21 and 7% respectively. This journal is
Preparation of novel synthons, uniquely functionalized tetrahydrofuran and tetrahydropyran derivatives
Nakada, Masahisa,Takano, Masashi,Iwata, Yukitaka
, p. 1581 - 1585 (2007/10/03)
The dianion of the acetoacetic ester reacts with epibromohydrin derivatives to afford a mixture of (Z)-2-alkoxycarbonylmethylidenetetrahydrofuran derivative and (E)-2-alkoxycarbonylmethylidenetetrahydropyran derivative. The selective formation of the tetr
Expeditious syntheses of sugar-modified nucleosides and collections thereof exploiting furan-, pyrrole-, and thiophene-based siloxy dienes
Rassu, Gloria,Zanardi, Franca,Battistini, Lucia,Gaetani, Enrico,Casiraghi, Giovanni
, p. 168 - 180 (2007/10/03)
A series of individual sugar-modified pyrimidine nucleosides including enantiomerically enriched 2',3'-dideoxynucleosides 14a-c (α and β anomers of L- and D-series), 2',3'-dideoxy-4'-thionucleosides 21a-c (α and β anomers of L- and D-series), and 2',3'-dideoxy-4'-azanucleosides 28a-c (β anomers of L- and D-series) were synthesized, with uniform chemistry and high stereochemical efficiency, exploiting a triad of versatile heterocyclic siloxy dienes, namely, 2-(tert-butyldimethylsiloxy)furan (TBSOF), 2-(tert- butyldimethylsiloxy)thiophene (TBSOT), and N-(tert-butoxycarbonyl)-2-(tert- butyldimethylsiloxy)pyrrole (TBSOP). The synthetic procedure advantageously used both enantiomers of glyceraldehyde acetonide (D-1 and L-1) as sources of chirality and as synthetic equivalents of the formyl cation. The outlined chemistry also allowed for the rapid assemblage of a 30-member collection of racemic nucleosides (D,L-L) as well as one 15-member ensemble of chiral analogues (L-L), along with some related sublibraries.
MICROBIAL TRANSFORMATION OF (-)-VERNOLIC ACID INTO (4R,5R)-5-HYDROXY-γ-DECALACTONE
Albrecht, Wolfgang,Tressl, Roland
, p. 1391 - 1396 (2007/10/02)
(-)-Vernolic acid, isolated and purified from seeds of Euphorbia lagascae was administered to cultures of Sporobolomyces odorus. (4R,5R)-5-Hydroxy-γ-decalactone 1 accumulated as the main product.The configuration of the product was determined by synthesis of all four stereoisomers and comparison of spectroscopic and chromatographic data.
A Convenient Synthesis of (R)-Japonilure
Chattopadhyay, S.,Mamdapur, V. R.,Chadha, M. S.
, p. 1299 - 1303 (2007/10/02)
The title pheromone has been synthesised in high optical purity using easily accessible (S)-glycerol-2,3-acetonide (2) as the starting chiron.
