Studies of The Reactivity of (1R,1′R)-3-exo, 3′-exo-Bicamphor; Preparation of New 3-exo, 3′-exo-Bibornane Derivatives
作者:Jean-Olivier Durand
DOI:10.1055/s-1999-3478
日期:1999.5
The preparative conversion of (1R,1′R)-3-exo, 3′-exo-bicamphor (1) in different useful 3-exo, 3′-exo-bibornane derivatives has been explored. The reactivity of bibornane type molecules was controlled by steric factors which made those products recalcitrant towards functionalisation and led to unusual behaviour. Nevertheless the synthesis of the monophosphine alcohol 9 was achieved in 4 steps and in 25% overall yield after a methylenation hydroboration-oxidation methodology applied to (1R,1′R)-3-exo, 3′-exo-bicamphor (1).
Stereoselective Oxidative Dimerization of (1<i>R</i>)-Camphor. A Short Synthesis of <i>e</i><i>xo</i>,<i>e</i><i>xo</i><i>‘</i>-3,3‘-Biisoborneol
作者:James McNulty、Monte J. Millar、Gérald Bernardinelli、Charles W. Jefford
DOI:10.1021/jo990394g
日期:1999.7.1
Bithiocamphor: an interesting synthon for the synthesis of chiral ligands
作者:Murielle Bonnat、Jean-Olivier Durand、Maurice Le Corre
DOI:10.1016/0957-4166(96)00039-0
日期:1996.2
Bithiocamphor 1 was studied; its reduction led to dithiols 3a and 3b, its oxidation led to bicamphor 8.
3-exo,3′-exo-(1R,1′R)-Bithiocamphor — a versatile source for functionally different 3,3′-bibornane derivatives, II. 1 An access to 3-exo,3′-exo-(1r,1′r)-bicamphor and related compounds
3-exo,3′-exo-(1R,1′R)-bicamphor (12) is obtained from 3-exo,3′-exo-(1R,1′R)-bithtiocamphor (3) by condensation with hydrazine hydrate followed by hydrolysis of the resulting dihydropyridazine 11. Deprotonation of 12 with NaH and subsequent treatment with potassium hexacyanoferrate (III) furnishes the 2,2′-dioxo-3,3′-bibornanylidene 13, whilst reduction of 12 with L1AlH4 affords the 3,3′-biisoborneol