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Our reliance on fossil fuels, which is unsustainable due to dwindling reserves, has led to various environmental issues. Lignocellulosic biomass could serve as a renewable source of carbon and energy for the production of fuels and chemicals. While several ...
The controlled aldol condensation between an aliph. ketone and an acetaldehyde equiv. remains a challenge. One soln. to this evergreen problem consists of the nucleophilic addn. of acetylene to the ketone and the subsequent isomerization of the resulting 3 ...
A one-pot procedure involving radical conjugate addition of B-alkylcatecholboranes to enones followed by intramolecular aldol reaction is reported. Application to the stereoselective synthesis of monocyclic and bicyclic products with up to four contiguous ...
In the presence of sulfur dioxide and an acid promoter, (-)-(1E,3Z)-2-methyl-1-((1S)-1-phenyleth- oxy)penta-1,3-dien-3-yl isobutyrate reacts with (Z)-3-(trimethylsilyloxy)-pent-2-ene giving a silyl sulfinate intermediate that undergoes, in the presence of ...
The cross-aldolization of (-)-(1S,4R,5R,6R)-6-endo-chloro-5-exo-(phenylseleno)-7-oxabicyclo[2.2.1] heptan-2-one ((-)-25) and of(+)-(3aR,4aR,7aR,7bS)- ((+)-26) and(-)-(3aS,4aS,7aS,7bR)-3a,4a,7a,7b-tetrahydro-6,6-dimethyl[1,3]dioxolo [4,5]furo[2,3-d]isoxazol ...
This project aims at the optimization of chemical reactions by using online analytical and chemometric methods. The experiments are carried out in a fully automated chemical reactor (1 liter). The host computer controls the standard process variables such ...
The 2,3-anti-3,4-syn-stereotriad (1Z,2S,3R,4S)-1-ethylidene-2,4-dimethyl-3-[(1S)-1-phenylethoxy]-5-oxopent-1-yl isobutyrate {(-)-8, obtained in a one-pot operation from the trimethylsilyl (Z)-enol ether derived from pentan-3-one and (1E,3Z)-1[(1S)-phenylet ...
A protected C29-C51 subunit ((+)-38) of Spongistatin 1 has been obtained. Key steps involve the aldol condensation of (3S,4R)-3-methyl-7-[(paramethoxybenzyl)oxy]-4-[(triethylsilyl)oxy]octan-2-one ((-)-6) with (tert-butyl)dimethylsilyl 4-deoxy-2,3-di-O-(met ...
The goal of our project (HES-SO n°11246) is to develop chemometric methods that enhance the development of chemical reactions. Semi-batch experiments are performed using a fully automated chemical reactor. Real-time analytical data, infrared (IR) spectra f ...
