Tetrahedron p. 177 - 182 (1985)
Update date:2022-08-11
Topics:
Grassi, M.
Silvestro, G. Di
Farina, M.
The synthesis is described of the two enantiomerically pure isomers (+)-(3S,7S,10S)- and (+)-(3S,7S,10R)-3,7,10-trimethylboratrane.The structures were determined by 1H- and 13C-NMR spectroscopy.A method for increasing the enantiomeric purity by trimerization reactions of partially-resolved (S)propylene oxide is proposed.The reaction was studied from the kinetic viewpoint and interpreted according to a binomial probability scheme.The experimental findings point to a rapid growth in enantiomeric purity for the (SSS) trimer compared with the starting material, whilst no increase was found for the (SSR) trimer.
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