PROCESS FOR PREPARING SATURATED AMINO ACIDS OR SATURATED AMINO ESTERS COMPRISING A METATHESIS STEP
申请人:Couturier Jean Luc
公开号:US20130116458A1
公开(公告)日:2013-05-09
The subject matter of the invention is a process for synthesizing a saturated long-chain o.,0)-amino ester (acid) obtained in a first step by cross-metathesis between an acrylic first compound and a monounsaturated second compound comprising at least one nitrile, acid or ester trivalent function, one of these compounds comprising a nitrile function and the other an acid or ester function, in the presence of a ruthenium carbene metathesis catalyst, and in a second step by hydrogenation of the monounsaturated nitrile ester (acid) obtained in the presence of the metathesis catalyst of the preceding stop, acting as a hydrogenation catalyst.
[EN] HIGH-COVERAGE, LOW ODOR MALODOR COUNTERACTANT COMPOUNDS AND METHODS OF USE<br/>[FR] COMPOSÉS AGISSANT CONTRE LES MAUVAISES ODEURS, À FAIBLE ODEUR ET À POUVOIR COUVRANT ÉLEVÉ, ET PROCÉDÉS D'UTILISATION
申请人:INT FLAVORS & FRAGRANCES INC
公开号:WO2016049523A1
公开(公告)日:2016-03-31
The present invention relates to novel compounds and their use as malodor counteractant materials.
(Ï-1)-Fluoroalk-(Ï-1)-enoic acids of chain lengths varying between C5 and C15 have been prepared by consecutive bromofluorination and dehydrobromination of either alk-(Ï-1)-enoic acids or alk-(Ï-1)-enyl acetates, in the latter case followed by oxidation. The halogen was found to increase the antimycotic properties of the unsaturated fatty acids, 10-fluoroundec-10-enoic acid exhibiting a particularly strong fungicidal activity.
selective fragmentation reactions of β-trimethylsilylketoximes have been proved to proceed effectively with acid catalysts giving the corresponding nitriles. Cyclic silylketoximes gave unsaturated nitriles. The fragmentation in the Beckmann rearrangement is completely controlled and directed by a trimethylsilyl group to lead the regio- and stereo-specific formation of the double bond. The catalytic fragmentation
Cyclic (E)-β-trimethylsilylketoxime acetates were effectively cleaved by a catalytic action of trimethylsilyl trifluoromethanesulfonate to give the corresponding unsaturated nitriles. The fragmentation in the Beckmann rearrangement is completely controlled and directed by trimethylsilyl group to lead regio- and stereospecific formation of the double bond.