Counterion-Enhanced Pd/Enamine Catalysis: Direct Asymmetric α-Allylation of Aldehydes with Allylic Alcohols by Chiral Amines and Achiral or Racemic Phosphoric Acids
catalytic procedure for the direct asymmetric α-allylation of branched aldehydes. The use of simple chiralamines and easily prepared achiral or racemic phosphoric acids, together with a suitable Pd-source resulted in a highly active and enantioselectivecatalyst system for the allylation of various α-branched aldehydes with different allylic alcohols. The reported procedure could provide an easy access to
Perfume compositions and perfumed materials and articles, containing
申请人:Naarden International N.V.
公开号:US04404127A1
公开(公告)日:1983-09-13
Perfume compositions, perfumed materials and articles containing one or more phenyl-tetrahydrofurans. Use of one or more phenyl-tetrahydrofurans having formula 1 or 2 of the formula sheet in which R.sub.1, R.sub.2 and R.sub.3 each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms and R.sub.4 represents a hydrogen atom, a methyl- or ethyl group as a perfume component in perfume compositions and in imparting perfume notes to materials and articles for example soaps, cleaning agents and cosmetic preparations.
Perfume compositions and perfumed materials and articles, containing phenyl-tetrahydrofurans as a fragrance
申请人:NAARDEN INTERNATIONAL N.V.
公开号:EP0049543A1
公开(公告)日:1982-04-14
Perfume compositions, perfumed materials and articles containing one or more phenyl-tetrahydrofurans.
Use of one or more phenyl-tetrahydrofurans having formula 1 or 2 of the formula sheet in which R1, R2 and R3 each represent a hydrogen atom or an alkyl group having 1 to 3 carbon atoms and R4 represents a hydrogen atom, a methyl- or ethyl group as a perfume component in perfume compositions and in imparting perfume notes to materials and articles for example soaps, cleaning agents and cosmetic preparations.
Palladium(0)-catalyzed rearrangement of N-allyl enamines. Synthesis of .delta.,.epsilon.-unsaturated imines and .gamma.,.delta.-unsaturated carbonyl compounds