Disclosed is a direct acid catalyzed intermolecular electrocyclic rearrangement process for the preparation of linear and cyclic homoallylic ester and amides.
本发明揭示了一种直接酸催化的分子间电环重排过程,用于制备线性和环状同烯基酯和酰胺。
NOVEL PROCESS
申请人:Givaudan S.A.
公开号:US20140288326A1
公开(公告)日:2014-09-25
A direct acid catalyzed intermolecular electrocyclic rearrangement process for the preparation of linear and cyclic homoallylic ester and amides. A one step intermolecular electrocyclic rearrangement process includes the step of reacting a beta, gamma-unsaturated aldehyde or ketone, in which the beta, gamma-unsaturation is not part of an aromatic ring, with another aldehyde or a secondary aldimine in the presence of an acid.
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
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.
One-step intermolecular electrocyclic rearrangement process
申请人:Givaudan S.A.
公开号:US09371262B2
公开(公告)日:2016-06-21
A direct acid catalyzed intermolecular electrocyclic rearrangement process for the preparation of linear and cyclic homoallylic ester and amides. A one step intermolecular electrocyclic rearrangement process includes the step of reacting a beta, gamma-unsaturated aldehyde or ketone, in which the beta, gamma-unsaturation is not part of an aromatic ring, with another aldehyde or a secondary aldimine in the presence of an acid.