71358-20-8Relevant articles and documents
Martinez et al.
, p. 1021,1022,1023 (1979)
Stereopure 1,3-butadiene-2-carboxylates and their conversion into non-racemic α-alkylidenebutyrolactone natural products by asymmetric dihydroxylation
Harcken, Christian,Brückner, Reinhard
, p. 3967 - 3971 (2007/10/03)
Dienoic esters 1 with the four possible permutations of the C=C configurations were prepared in two steps via non-stereoselective aldol additions followed by stereospecific β-eliminations. Sharpless dihydroxylations of these esters yielded natural and unnatural α-alkylidene-β-hydroxybutyrolactones 2. Among these were synthetic dihydromahubanolide B (cis,Z-2a), isodihydromahubanolide B (cis,E-2a) and, for the first time, litsenolide D1 (ent-trans,Z-2b) and the enantiomer trans,E-2b of litsenolide D2. Competitively, dihydroxyesters 10 were formed.
Stereoelectronic Control of the Diastereoselectivity in the Photooxygenation (Schenck Ene Reaction) of an Electron-Poor Allylic Alcohol and Its Ethers
Adam, Waldemar,Renze, Juergen,Wirth, Thomas
, p. 226 - 227 (2007/10/03)
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