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Aromatic aldols and 1,5-diketones as optimized fragrance photocages†
Axel G. Griesbeck,Olga Hinze,Helmut Görner,Ursula Huchel,Christian Kropf,Uta Sundermeier,Thomas Gerke
Photochemical & Photobiological Sciences Pub Date : 02/10/2012 00:00:00 , DOI:10.1039/C2PP05286E
Abstract

Aromatic aldols and 1,5-diketones with abstractable γ-hydrogen atoms are highly photoactive cage molecules for the release of fragrance carbonyl compounds (aldehydes and Michael ketones, respectively). Aldols 3a–d are easily accessible by Mukaiyama addition and are cleaved to form the substrates with high quantum yields under solar radiation. By tuning the properties of the chromophores, a series of δ-damascone cages 5 were developed that can be used for selective and fast (5a,e) or slow (5b,d) release of fragrances under air and solar irradiation. The intermediates of the Norrish II process were observed by laser transient absorption spectroscopy.

Graphical abstract: Aromatic aldols and 1,5-diketones as optimized fragrance photocages
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