Ciba-geigy Corporation

Firmenich Sa

Other

Novartis Corporation

Albert Eschenmoser

Karl-Heinz Altmann

Gunther Ohloff

Rene Imwinkelried

Ferdinand Naf

Erling Sundt

Ren E Imwinkelried

Dorothee Felix

Paul A Stadler

Compounds of the formulae I and Ia and their racemates ##STR1## in which A is --CH.sub.2 -- or --CH.sub.2 CH.sub.2 --, R.sub.1 is hydrogen or a protective group, R.sub.2 is hydrogen or a protective group or a radical forming a phosphorus-containing nucleotide bridge group and B is a purine or pyrimidine radical or an analogue thereof, can be used as antiviral active ingredients or for the preparation of biologically active oligonucleotides.

Carbocyclic nucleosides containing bicyclic rings, oligonucleotides

Carbocyclic nucleosides containing bicycle rings, oligonucleotides

New process for preparing unsaturated bicyclic hydrocarbons useful as intermediate compounds in the preparation of macrocyclic ketones.

Process for preparing unsaturated bicyclic hydrocarbons

Process for the preparation of poly-unsaturated hydrocarbons, in particular undeca-1,3,5-triene, which comprises reacting a quaternary phosphonium salt with hexanal. The product obtained in accordance with the process of the invention is a useful perfuming ingredient.

Process for the preparation of poly-unsaturated hydrocarbons

Oxygenated decalin derivatives, the use thereof as fragrances or odor-modifying agents, and methods for preparing the said derivatives.

Oxygenated decalin derivatives

.alpha.-Halogen-nitrones of the formula ##EQU1## wherein Hal is a bromine or preferably a chlorine atom, R.sub.1 represents a cycloalkyl or an alkyl radical and R.sub.2 is hydrogen or an organic radical. Use as intermediates especially for the substitution of a hydrogen atom in aromatic compounds by the radical ##EQU2##

New nitrones, their manufacture and their use for the manufacture of

A process for the manufacture of aldehydes of the general formula ##EQU1## in which the symbols R.sub.1, R.sub.2 and R.sub.3 stand for hydrogen or organic radicals and in which at least two of these radicals are linked together by fragmenting a corresponding aziridine compound of the general formula ##EQU2## in which R.sub.1, R.sub.2 and R.sub.3 are as above and R.sub.4 to R.sub.7 each represents hydrogen, an alkoxycarbonyl, cyano, nitro or sulphonyl group or an alkyl, alkenyl, cycloalkenyl or alkyl residue and two or more of these residues may be linked together with simultaneous evolution of nitrogen.

Growing community of inventors

Kusnacht, Switzerland

Albert Eschenmoser