Solvolysis rates and .beta.-deuterium secondary kinetic isotope effects of some tertiary and secondary alk-5-enyl derivatives. Evidence for .pi.-participation
摘要:
Tertiary 1,1-dimethylalk-5-enyl chlorides solvolyze in 80% v/v ethanol with no or moderate rate enhancements attributable to pi-participation. However, secondary beta-deuterium kinetic isotope effects (KIE, two deuterated methyl groups) are significantly reduced (k(H)/k(D) = 1.22-1.57) relative to the saturated analogues (k(H)/k(D) = 1.80), indicating participation of the double bond. Secondary 1-methylalk-5-enyl tosylates show the same trends, i.e., no or very moderate rate enhancements but reduced beta-deuterium secondary KIE relative to the saturated analogue.
The present invention relates to a fragrance composition comprising ionic liquids for enhanced evaporation of the perfume raw materials. The invention also relates to methods of use of the fragrance compositions for perfuming suitable substrates, particularly skin and hair.
The present invention relates to a fragrance composition comprising ionic liquids for delayed evaporation of the perfume raw materials. The invention also relates to methods of use of the fragrance compositions for perfuming suitable substrates, particularly skin and hair.
This invention relates to stable odorant systems, compositions comprising such systems and processes for making and using such systems and compositions.
本发明涉及稳定的香味剂系统、包含此类系统的组合物、制备和使用此类系统和组合物的方法。
STABLE ODORANT SYSTEMS
申请人:Loughnane Brian Joseph
公开号:US20110041259A1
公开(公告)日:2011-02-24
This invention relates to stable odorant systems, compositions comprising such systems, and processes for making and using such systems and compositions.
本发明涉及稳定的气味剂系统,包括这些系统的组成物和制备和使用这些系统和组成物的方法。
Compositions and methods for surface treatment with lipases
申请人:The Procter & Gamble Company
公开号:EP2623586A2
公开(公告)日:2013-08-07
Methods and compositions for treating textiles and hard surfaces with compositions having specific lipases are described. The compositions have increased stability to oxidative degradation in particular due to bleach catalysts.