178035-24-0Relevant articles and documents
Copper mediated scalemic organolithium reagents in alkaloid syntheses
Dieter, R. Karl,Chen, Ningyi,Watson, Rhett T.
, p. 3221 - 3230 (2007/10/03)
Scalemic 2-pyrrolidinylcuprates generated via asymmetric deprotonation of N-Boc-pyrrolidine followed by treatment with THF soluble CuCN·2LiCl react with ω-functionalized vinyl halides to afford 2-alkenyl-N-Boc- pyrrolidines. N-Boc deprotection and cyclization via intramolecular N-alkylation generates the pyrrolizidine or indolizidine skeletons. Subsequent functional group manipulation affords enantioenriched (+)-heliotridane, (+)-isoretronecanol, a formal synthesis of (+)-laburnine, (+)-(R)-2,3,5,7a- tetrahydro-1H-pyrrolizine, (R)-1,2,3,5,6,8a-hexahydroindolizine, (+)-ent-δ-coniceine, (+)-tashiromine and (+)-5-epitashiromine.
Intramolecular carbolithiation reactions of chiral alpha-amino-organolithium species.
Ashweek, Neil J,Coldham, Iain,Snowden, David J,Vennall, Graham P
, p. 195 - 207 (2007/10/03)
Enantiomerically enriched alpha-amino-organolithium species, in which the lithium atom is attached to a stereogenic carbon centre, have been found to be chemically stable at room temperature in a solvent of very low polarity and undergo intramolecular car