H<sub>3</sub>PW<sub>12</sub>O<sub>40</sub>as a Useful Recyclable Heterogeneous Catalyst for the Facile and Highly Efficient Michael Addition Reaction of Thiols to α,β-Unsaturated Ketones
作者:Habib Firouzabadi、Nasser Iranpoor、Abbas Ali Jafari
DOI:10.1055/s-2004-837212
日期:——
Solid H 3 PW 1 2 O 4 0 is easily used as a heterogeneous, reusable and efficient catalyst (1 mol%) for the selective addition of thiols and dithiols to α,β-unsaturated ketones in MeCN to afford the corresponding Michael adducts in excellent yields at room temperature.
固体 H 3 PW 1 2 O 4 0 很容易用作多相、可重复使用和高效的催化剂 (1 mol%),用于将硫醇和二硫醇选择性加成到 MeCN 中的 α,β-不饱和酮,以优异的性能提供相应的迈克尔加合物在室温下产生。
[EN] COMPOUNDS FOR PROVIDING A LONG-LASTING FLORAL AND FRUITY ODOR<br/>[FR] COMPOSÉS DESTINÉS À FOURNIR UNE ODEUR FLORALE ET FRUITÉE DE LONGUE DURÉE
申请人:FIRMENICH & CIE
公开号:WO2021122997A1
公开(公告)日:2021-06-24
The present invention relates to the field of perfumery. The present invention relates to compounds of formula (I) that are able to provide a long-lasting or substantive odor, in particular floral and/or fruity odor, to the environment. Moreover, the present invention relates to a method of imparting a long-lasting odor, in particular a fresh green, floral and/or fruity odor, to surfaces, such as hard surfaces, fabric, skin or hair. Furthermore, the present invention relates to the use of said compounds in perfumery, as well as the perfuming compositions or perfumed articles comprising the invention's compounds.
Surface-mediated solid phase reaction: Dramatic improvement of Michael reaction on the surface of alumina
作者:Brindaban C. Ranu、Sanjay Bhar
DOI:10.1016/s0040-4020(01)90794-x
日期:1992.1
The Michael reaction of several 1,3-dicarbonyl compounds, nitroalkanes, and thiols as donors with methyl vinyl ketone, acrolein, methyl acrylate, methyl methacrylate, and mesityl oxide as acceptors on the surface of alumina without any solvent proceed very effeciently and furnish high yield of adducts.
COMPOUNDS FOR PROVIDING A LONG-LASTING FLORAL AND FRUITY ODOR