The RuO<sub>4</sub>-Catalyzed Ketohydroxylation. Part 1. Development, Scope, and Limitation
作者:Bernd Plietker
DOI:10.1021/jo048822s
日期:2004.11.1
procedure allows the recovery of the ruthenium catalyst by precipitation while simplifying the overall product purification. The second part of the paper focuses on exploration of scope and limitation. A variety of substituted olefins are oxidized to α-hydroxy ketones in good to excellent regioselectivities and yield. Cyclic substrates proved to be problematic to oxidize; however, a careful analysis
The use of methoxy(phenyldimethylsilyl)methyl-lithium as a formyl anion equivalent
作者:David J. Ager、James E. Gano、Shyamal I. Parekh
DOI:10.1039/c39890001256
日期:——
Methoxy(phenyldimethylsilyl)methyl-lithium provides a new formylanionequivalent which affords α-hydroxyaldehydes via and oxidative desilylation procedure.
Attractant termiticidal compounds, compositions and methods of use therefor
申请人:THE RESEARCH FOUNDATION OF
STATE UNIVERSITY OF NEW YORK
公开号:EP0104880A2
公开(公告)日:1984-04-04
Alpha - fluoro- omega - hydroxy straight chain hydrocarbons are utilized to form attractant termiticidal compositions which are safe and economical for the combatting of termites and related pests.
Provided is a clear aqueous ceramide composition comprising 1.0 to 5.0% by weight, based on the total composition, of a ceramide represented by formula (I):
wherein R1 represents a hydrocarbon group having 9 to 17 carbon atoms; and R2 represents an acyl group having 2 to 30 carbon atoms which can contain a hydroxyl group,
a long-chain fatty acid having 12 to 24 carbon atoms, a nonionic surface active agent, and water. The clear aqueous composition is useful as cosmetics, bath agents, hair-careproducts, external preparations for the skin, skin protective preparations, particularly medical external preparations for the treatment or protection of the skin, or a component making up these preparations.
There is provided a fragrance-retaining composition comprising: an ingredient (A) composed of 2-acylaminoalkan-1,3-diols and/or optically active forms thereof represented by the formula I:
in which R1 signifies a straight-chain alkyl group having 9 to 17 carbon atoms, and R2 signifies a straight-chain acyl group having 14 to 24 carbon atoms and of 2-acylaminoalkan-1,3-diols and/or optically active forms thereof represented by the formula II:
in which R1 signifies a straight-chain alkyl group having 9 to 17 carbon atoms, and R3 signifies an acetyl group or a straight-chain acyl group having 2 to 24 carbon atoms with a hydroxy group at α- or β-position; and an ingredient (B) consisting of sterol-based compounds.