814-78-8Relevant articles and documents
Cassis and Green Tea: Spontaneous Release of Natural Aroma Compounds from β-Alkylthioalkanones
B?ttig, Sarah,Bochet, Christian G.,Egger, Timothy,Flachsmann, Felix,Gey, Olga
, (2021/10/19)
In depth headspace analysis of the slow degradation of β-alkylthioalkanones in ambient air led to the discovery of a novel δ-cleavage pathway, by which β-mercaptoketones are released. Since β-mercaptoketones are potent natural aroma compounds occurring in many fruits, herbs and flowers, the discovery of an enzyme-independent molecular precursor for this class of high-impact molecules is of practical importance. Moreover, the formation of β-diketones and aldehydes by concomitant oxidation at the α-sulfur-position enhances the versatility of this class of aroma precursors. A mechanistic model is proposed which suggests that the oxidative degradation occurs through a novel Pummerer-type rearrangement of initially formed persulfoxides.
A structure/catalytic activity study of gold(i)-NHC complexes, as well as their recyclability and reusability, in the hydration of alkynes in aqueous medium
Fernández, Gabriela A.,Chopa, Alicia B.,Silbestri, Gustavo F.
, p. 1921 - 1929 (2016/04/05)
We conducted a structure/catalytic activity study of water-soluble gold(i) complexes-supporting sulfonated NHC ligands-in the hydration of alkynes in pure water or water nsp;:nsp;methanol (1nsp;:nsp;1), as well as their recyclability. Comparative studies were carried out with the addition of different silver salts. Our results indicate that the bulkier complex is the most effective and that the addition of methanol as co-solvent not only shortens reaction times but also stabilizes the less bulky complexes.
3-methyl-3-penten-2-one preparation method
-
Paragraph 0019-0021, (2016/10/24)
The invention relates to a preparation method of 3-methyl-3-amylene-2-ketone. The preparation method comprises the steps of mixing butanone and a solid acid catalyst at 0-80 DEG C, adding acetaldehyde, fully mixing, reacting continuously, separating and purifying after reaction to obtain the 3-methyl-3-amylene-2-ketone, wherein the solid acid catalyst is highly-acidic dry type sulfonic acid group based polystyrene with H or sulfonic acid group based perfluorination cation exchange resin. According to the method, the solid acid catalyst is adopted, compared with the traditional synthetic method that strong acid and strong base are used, the method can greatly reduce the follow-up separation difficulty and environment pollution degree, no equipment corrosion is caused, and the product yield and the purity are high, therefore, the preparation method of 3-methyl-3-amylene-2-ketone is green and environment-friendly; and besides, no assisted solvent is adopted, the follow-up separation difficulty is reduced, the energy consumption and the production cost are low, and the industrial reliability is strong.