Biomimetic Total Synthesis of (±)-Doitunggarcinone A and (+)-Garcibracteatone
摘要:
A full account of our oxidative radical cyclization approach to the synthesis of garcibracteatone and doitunggarcinone A is presented. This includes the first enantioselective synthesis of garcibracteatone, which allowed the absolute configuration of the natural compound to be determined. The first synthesis of doitunggarcinone A is also described, which confirms our reassignment of the relative configuration of this molecule. Novel syntheses of monoterpene fragments used to construct the target molecules are also reported.
Biomimetic Total Synthesis of (±)-Doitunggarcinone A and (+)-Garcibracteatone
摘要:
A full account of our oxidative radical cyclization approach to the synthesis of garcibracteatone and doitunggarcinone A is presented. This includes the first enantioselective synthesis of garcibracteatone, which allowed the absolute configuration of the natural compound to be determined. The first synthesis of doitunggarcinone A is also described, which confirms our reassignment of the relative configuration of this molecule. Novel syntheses of monoterpene fragments used to construct the target molecules are also reported.
We report herein a regio‐ and stereoselective photocatalytic hydrogenolysis of allylicalcohols to form unsaturated hydrocarbons employing a palladium(II)‐loaded titanium oxide; the reaction proceeds at room temperature under light irradiation without stoichiometric generation of salt wastes. Olefin and saturated alcohol moieties tolerated the reaction conditions. Hydrogen atoms were selectively incorporated
Sur la reactivite des organomagnesiens derivant de l'addition d'organomagnesiens allyliques sur l'isoprene
作者:F. Barbot、Ph. Miginiac
DOI:10.1016/s0022-328x(00)81295-4
日期:1978.2
Contrary to a recent report, it is shown that allylic Grignardreagents prepared by treating allylic Grignardreagents with isoprene and a catalytic amount of Cp2TiCl2 react normally with carbon dioxide and carbonyl compounds: a complete allylic rearrangement is observed.
Lavandulol wurde aus 2,6-Dimethylhepten-(2)-ol-(6) durch Anlagerung von Formaldehyd nach Prins und Pyrolyse des Reaktions-produktes gewonnen. Der Alkohol bestand vorwiegend aus der Limonenform. Er wurde durch verschiedene Reaktionen identifiziert.
Metal-assisted terpenoid synthesis. I. Regioselective isoprene insertion into an allyl-magnesium bond and the applications to synthesis of natural terpenoids
作者:Susumu Akutagawa、Sei Otsuka
DOI:10.1021/ja00856a049
日期:1975.11
BARBOT F.; MIGINIAC P., J. ORGANOMETAL. CHEM., 1978, 145, NO 3, 269-276