Cyclocarbonylation of dihydromyrcenol into the corresponding lactone can be selectively performed in the presence of PdCl2(PPh3)2)/SnCl2·2H2O and 4 Å molecular sieves.
Dihydromyrcenol carbonylation catalyzed by palladium–tin precursors: selectivity of the reaction drawn by the experimental conditions and the co-reactants
The methoxycarbonylation of dihydromyrcenol 1 has been carried out in the presence of the catalytic system [PdCl2(PPh3)(2)]-SnCl(2)(.)2H(2)O-2PPh(2). This study shows that it is possible to reduce the amounts of isomerization of the terminal double bond and the dehydration side-reaction of the tertiary alcoholic function. According to the experimental conditions (P-CO = 40 or 100 bar, concentration of methanol, experiment duration, temperature) it is possible to orient the reaction towards the three 'linear' esters 4, 5. 6. and lactone 8. This latter product has been exclusively obtained when the acidity of the medium is controlled. Nevertheless it is more difficult to obtain one ester from each others. (C) 2002 Elsevier Science B.V. All rights reserved.
GRANULAR DETERGENT OR BLEACHING COMPOSITIONS CONTAINING AMIDOPEROXYACID BLEACH AND PERFUME
申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP0557419A1
公开(公告)日:1993-09-01
GANZZELL-BIOTRANSFORMATION VON FETTSÄUREN ZU DEN UM EIN KOHLENSTOFFATOM VERKÜRZTEN FETTALDEHYDEN
申请人:Symrise AG
公开号:EP2609207B1
公开(公告)日:2015-12-30
[EN] GRANULAR DETERGENT OR BLEACHING COMPOSITIONS CONTAINING AMIDOPEROXYACID BLEACH AND PERFUME
申请人:THE PROCTER & GAMBLE COMPANY
公开号:WO1992008780A1
公开(公告)日:1992-05-29
(EN) Granular detergent or bleaching compositions, preferably for laundry use, containing amidoperoxyacid bleach and selected perfume ingredients having improved stability when in direct contact with the bleach.(FR) Compositions détersives ou de blanchiments granulaires destinées de préférence à un usage en blanchisserie, contenant un agent de blanchiment d'amidoperoxyacide ainsi que des ingrédients de parfum sélectionnés présentant une meilleure stabilité lorsqu'ils sont en contact direct avec l'agent de blanchiment.