Acyclic stereoselection. Part 42. 1,4- and 1,5-Stereoselection by sequential aldol addition to a .alpha.,.beta.-unsaturated aldehydes followed by Claisen rearrangement. Application to total synthesis of the vitamin E side chain and the archaebacterial C40 diol
The total synthesis of the archaebacterial C40-diol and its enantiomer based on (R)-5-acetoxy-4-methylpentanoic acid
作者:B. A. Czeskis、I. G. Alexeev、A. M. Moiseenkov
DOI:10.1007/bf00702017
日期:1993.7
Effective convergent syntheses of archaebacterial C40-diol [(3R,7R,11S,15S,18S,22S, 26R,30R)-octamethyldotriacontane-1,32-diol] and its (3S,7S,11R,15R,18R,22R,26S,30S)-enantiomer have been accomplished using (R)-5-acetoxy-4-methylpentanoic acid as the only chiral building block. Both synthetic schemes include consecutive construction of mono- and diterpene fragments of the target molecules followed
HEATHCOCK, CLAYTON H.;FINKELSTEIN, BRUCE L.;JARVI, ESA T.;RADEL, PEGGY A.+, J. ORG. CHEM., 53,(1988) N 9, 1922-1942
作者:HEATHCOCK, CLAYTON H.、FINKELSTEIN, BRUCE L.、JARVI, ESA T.、RADEL, PEGGY A.+
DOI:——
日期:——
Detection of regioisomeric macrocyclic tetraethers in the lipids of Methanobacterium thermoautotrophicum and other archaeal organisms
作者:Otto Gräther、Duilio Arigoni
DOI:10.1039/c39950000405
日期:——
Chemical degradation shows that an apparently homogeneous preparation from the lipids of Methanobacterium thermoautotrophicum is in fact a mixture of the regioisomeric compounds 2 and 8 differing in the relative orientation of their glycerol units; a similar situation holds for the related diglycerol tetraethers of Thermoplasma acidophilum and Sulfolobus solfataricus.