A Synthesis of A-Ring Synthons for Dihydrotachysterols
作者:Rob Boer Rookhuizen、Jaap C. Hanekamp、Hendrik J.T. Bos
DOI:10.1016/s0040-4039(00)91693-9
日期:1992.3
Phosphine oxides 1 and 2, enantiomeric synthons for the preparation of dihydrotachysterols, were synthesized from the appropriate dihydrocarvones.
PHOTOLABILE PRO-FRAGRANCES
申请人:Henkel AG & Co. KGaA
公开号:US20180170849A1
公开(公告)日:2018-06-21
A method for producing photo-cleavable fragrance pre-cursors is described, which includes potential stereoselective method steps, agents containing the fragrance pre-cursors and the use of the fragrance pre-cursors for prolonging the scent impression in the agent and on surfaces treated with said agent.
Die vorliegende Erfindung beschreibt ein Verfahren zur Herstellung von photospaltbaren Duftstoffvorläufern einschließlich potentieller stereoselektiven Verfahrensschritte, Mittel, die die Duftstoffvorläufer enthalten, und die Verwendung der Duftstoffvorläufer zur Verlängerung des Dufteindrucks im Mittel und auf mit dem Mittel behandelten Oberflächen.
Photocaged Hydrocarbons, Aldehydes, Ketones, Enones, and Carboxylic Acids and Esters that Release by the Norrish II Cleavage Protocol and Beyond: Controlled Photoinduced Fragrance Release
volatile organic molecules are described: terpene hydrocarbons, aldehydes, ketones, Michael-type α,β-unsaturated enones, and carboxylicacids and esters. These caged molecules are released by photoexcitation via carbonyl-directed hydrogen-transfer processes and subsequent C–C bond cleavage (Norrish Type II) or by didenitrogenation of diazirines. Five families of caged fragrance compounds that allow the