19788-48-8Relevant articles and documents
Thioether profragrances: Parameters influencing the performance of precursor-based fragrance delivery in functional perfumery
Maddalena, Umberto,Trachsel, Alain,Fankhauser, Peter,Berthier, Damien L.,Benczdi, Daniel,Wang, Wei,Xi, Xiujuan,Shen, Youqing,Herrmann, Andreas
, p. 1700 - 1733 (2015/02/19)
A series of thioether profragrances was prepared by reaction of different sulfanylalkanoates with δ-damascone and tested for their release efficiencies in a fabric-softener and an all-purpose cleaner application. Dynamic headspace analysis on dry cotton and on a ceramic plate revealed that the performance of the different precursors depended on the structure, but also on the particular conditions encountered in different applications. Moreover, profragrances derived from other α,β-unsaturated fragrance aldehydes and ketones were synthesized analogously and evaluated using the same test protocol. Thioethers were found to be suitable precursors to release the corresponding fragrances, but neither the quantity of profragrance deposited from an aqueous environment onto the target surface, nor the amount of fragrance released after deposition could be linearly correlated to the hydrophilicity or hydrophobicity of the compounds. Different sets of compounds were found to be the best performers for different types of applications. Only one of the compounds evaluated in the present work, namely the thiolactic acid derivative of δ-damascone, efficiently released the corresponding fragrance in both of the tested applications. Profragrance development for functional perfumery thus remains a partially empirical endeavour. More knowledge (and control) of the various application conditions are required for an efficient profragrance design.
AGENT FOR PERMANENT HAIR PROCESSING
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Page/Page column 20, (2008/06/13)
An agent for permanent hair processing is disclosed that can shape the hair even in a neutral to slightly acidic pH region. The agent contains one or more compounds represented by the following formula (1) and/or formula (2): (1) wherein R1 is a hydrogen atom or an alkyl group of 1 to 5 carbon atoms, R2 is an alkoxyalkyl group having a total of 3 to 15 carbon atoms, and the alkylene portion of R2 may contain an ether bond(s); (2) wherein R3 is an alkoxyalkyl group having a total of 3 to 15 carbon atoms, and the alkylene portion of R3 may contain an ether bond(s).