2606-50-0Relevant academic research and scientific papers
A concise synthesis of (S)-(+)-ginnol based on catalytic enantioselective addition of commercially unavailable Di(n -alkyl)zinc to aldehydes and ketones
Hatano, Manabu,Mizuno, Tomokazu,Ishihara, Kazuaki
experimental part, p. 2024 - 2028 (2010/10/04)
Catalytic, enantioselective n-alkyl addition of commercially unavailable di(n-alkyl)zinc reagents, which were prepared by a refined version of Charettes 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 1:2.5:1.6 molar ratio of ZnClNaOMe/RMgCl under solvent-free conditions was essential. Optically pure (S)-(+)-ginnol (17) was readily synthesized in one step for the first time by the catalytic enantioselective n-nonylation of icosanal. Georg Thieme Verlag.
Synthesis of (S)-nonacosan-10-ol, the major component of tubular plant wax crystals
Dommisse, Aarnoud,Wirtz, Jennifer,Koch, Kerstin,Barthlott, Wilhelm,Kolter, Thomas
, p. 3508 - 3511 (2008/02/12)
(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 chain elongation by cross metathesis. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
Synthesis of (+)-ginnol, a type R(long)-CH(OH)-R'(long) alcohol, by an asymmetric β,γ-unsaturated ester→γ-butyrolactone conversion
Berkenbusch, Thilo,Brueckner, Reinhard
, p. 11471 - 11480 (2007/10/03)
An enantioselective synthesis of (+)-ginnol (17) illustrates how Sharpless' asymmetric dihydroxylation may be used for the asymmetric synthesis of monoalcohols. The dihydroxylation was perfomed with AD mix α and the unsaturated ester trans-9. The resulting lactone cis-13 was dehydrated giving butenolide 13 (96.2% ee) from where we proceeded to the title compound 17 in three steps. Butenolide 13 showed 88-94%ee when ester trans-9 contained cis-isomer due to too forcing reaction condition on the way to the precursor acids trans- and cis-7.
Catalytic Asymmetric Reductive Addition of Olefins to Aldehydes Mediated by Boron and Zinc Organometallics
Schwink, Lothar,Knochel, Paul
, p. 9007 - 9010 (2007/10/02)
A procedure involving a hydroboration, boron-zinc exchange and asymmetric addition to an aldehyde allows the reductive addition of olefins to aldehydes in 50-96percent ee.A short and efficient 3 step synthesis of ginnol (61percent overall yield, 92percent ee) demonstrates the synthetic utility of the method.
