Marju Laars

Gaëlle Mingat; Paul MacLellan; Marju Laars; Jonathan Clayden

The synthesis of tertiary thiols in enantiomerically enriched form is accomplished by lithiation of enantiomerically enriched N-aryl allylic thiocarbamates. Formation of an allyllithium derivative promotes intramolecular N to C aryl migration to the position α to sulfur, generally with good stereospecificity. The substrates may themselves be obtained by Pd-catalyzed enantioselective [3,3]-sigmatropic rearrangement of N-aryl O-allyl thiocarbamates. Solvolysis of the product thiocarbamates yields tertiary thiols, which may be converted to sulfide derivatives.

Marju Laars; Kerti Ausmees; Marina Kudrjashova; Tõnis Kanger; Franz Werner

In the title compound, C10H22N2 2+·2Br−, a precursor in the synthesis of organocatalysts, the bipiperidinium ion is located on a twofold rotation axis which passes through the mid-point of the central C—C bond. The piperidinium ring adopts a chair conformation. In the crystal, the cations are linked together by Br− ions through N—H⋯Br hydrogen bonds, forming layers parallel to the ab plane.

Sarah Sulzer Mosse; Marju Laars; Kadri Kriis; Tõnis Kanger; Alexandre Alexakis

Marju Laars; Kerti Ausmees; Merle Uudsemaa; Toomas Tamm; Tõnis Kanger; Margus Lopp

Tõnis Kanger; Kadri Kriis; Marju Laars; Tiiu Kailas; Aleksander-Mati Müürisepp; Tõnis Pehk; Margus Lopp

Marju Laars; Kadri Kriis; Tiiu Kailas; Aleksander-Mati Müürisepp; Tõnis Pehk; Tõnis Kanger; Margus Lopp

Marju Laars; Henri Raska; Margus Lopp; Tõnis Kanger

Merle Uudsemaa; Marju Laars; Kadri Kriis; Toomas Tamm; Margus Lopp; Tõnis Kanger

Sarah Sulzer-Mossé; Marju Laars; Kadri Kriis; Tõnis Kanger; Alexandre Alexakis

Tõnis Kanger; Marju Laars; Kadri Kriis; Tiiu Kailas; Aleksander-Mati Müürisepp; Tõnis Pehk; Margus Lopp