Abstract:
Disclosed is a direct acid catalyzed intermolecular electrocyclic rearrangement process for the preparation of linear and cyclic homoallylic ester and amides.
Abstract:
Compounds of formula (I) wherein R is hydrogen and the bond between C-2 and C-3 together with the dotted line represents a double bond, or R is - CH 2 - and together with C-2 and C-3 represents a cyclopropane ring and the bond between C-2 and C-3 together with the dotted line represents a single bond, having floral rosy odor notes, their use as fragrance and perfumed products comprising them.
Abstract:
Compounds of formula (1) wherein R is hydrogen and the bond between C-2 and C-3 together with the dotted line represents a double bond, or R is - CH 2 - and together with C-2 and C-3 represents a cyclopropane ring and the bond between C-2 and C-3 together with the dotted line represents a single bond, having floral rosy odor notes, their use as fragrance and perfumed products comprising them.
Abstract:
The present invention relates to a process for the production of formyl cyclohexene derivatives which are suitable as odorants as such or as intermediates for the preparation of further odorants. In particular the present invention relates to a domino-methylenation-Diels-Alder reaction of, α,β-unsaturated aldehydes using formaldehyde in the presence of 1,3-butadienes
Abstract:
A compound of formula I wherein R 1 , R 2 , R 3 and R 4 can be independently selected from H or Me, n = 0, 1, the dotted lines are indicating single bonds, or in case n = 0 an isolated double bond at position 3', or in case n = 1 an isolated double bond at position 3' or 4', and the wavy bond is indicating an unspecified configuration of the adjacent double bond. Said compounds, as well as precursors capable to generate said compounds, are useful as fragrance ingredients.
Abstract:
A process of forming methoxymelonal comprising the steps of treating a solution of citronellene to ozonolysis, and hydrogenating the product formed to provide methoxymelonal.
Abstract:
Disclosed are substituted 2-oxaspiro [5.5]undec-8-ene derivatives of formula (I) and their use as odorants. This disclosure relates furthermore to a method of their production and flavour and fragrance compositions comprising them.
Abstract:
A method of forming a macrocyclic musk compound comprising the steps of:- i) cross-metathesizing a first olefin and a second olefin in the presence of a homogeneous transition metal catalyst comprising an alkylidene ligand, to form a statistical mixture of a hetero-dimer intermediate of said first and second terminal olefin, and homo-dimers ii) separating the hetero-dimer from the statistical mixture of hetero-and homo- dimers iii) and cyclizing the hetero-dimer intermediate to form the macrocyclic musk compound.
Abstract:
An aryl-substituted alkanal compound having a molecular weight of less than 300 g/mol and which bears a substituent on the aryl ring ortho to a substituent bearing the aldehyde functionality. Said compounds are useful as perfume ingredients in personal care and household care products.