(S)-Nonacosan-10-ol [(+)-Ginnol] is the main component of the tubular wax aggregates, which are found on many plant leaves. To investigate the role of this lipid for the formation of super hydrophobic self-cleaning plant surfaces, both enantiomers of the title compound were prepared in six steps. Key steps are the resolution of the allylation product of decanal with (R)-O-methylmandelic acid, and a
Catalytic asymmetric reductive addition of olefins to aldehydes mediated by boron and zinc organometallics
作者:Lothar Schwink、Paul Knochel
DOI:10.1016/0040-4039(94)88412-9
日期:1994.11
A procedure involving a hydroboration, boron-zinc exchange and asymmetricaddition to an aldehyde allows the reductiveaddition of olefins to aldehydes in 50–96 % ee. A short and efficient 3 step synthesis of ginnol (61 % overall yield, 92 % ee) demonstrates the synthetic utility of the method.
A Concise Synthesis of (S)-(+)-Ginnol Based on Catalytic Enantioselective Addition of Commercially Unavailable Di(n-alkyl)zinc to Aldehydes and Ketones
作者:Kazuaki Ishihara、Manabu Hatano、Tomokazu Mizuno
DOI:10.1055/s-0030-1258129
日期:2010.8
Catalytic, enantioselective n-alkyl addition of commercially unavailable di(n-alkyl)zinc reagents, which were prepared by a refined version of Charette's procedure with Grignard reagents, to aldehydes and ketones was developed. To minimize the side reactions in the catalysis by chiral phosphoramide ligand (1) or 3,3'-diphosphoryl-BINOL ligand (2), a preparation of di(n-alkyl)zinc reagents with a 1:2
A long-chain epoxide from stem wax of Rubus thibetanus
作者:Emile M. Gaydou、Isabelle Bombarda、Robert Faure、Eckhard Wollenweber
DOI:10.1016/0031-9422(95)00262-6
日期:1995.9
The structure of a new long-chainepoxide, (Z)-9,10-epoxynonacosane, isolated from the stem wax of Rubus thibetanus, has been established using mass and NMR spectroscopy techniques.