[DE] 2-ALKYLIDEN- UND 2-(ALKYL-1-EN)-CYCLOPENTANONE ALS RIECHSTOFFE<br/>[EN] 2-ALKYLIDENE- AND 2-(ALKYL-1-ENE)-CYCLOPENTANONE AS PERFUMES<br/>[FR] 2-ALKYLIDENE-CYCLOPENTANONES ET 2-(ALKYL-1-ENE)-CYCLOPENTANONES COMME PARFUMS
申请人:SYMRISE GMBH & CO KG
公开号:WO2006030010A1
公开(公告)日:2006-03-23
Beschrieben wird die Verwendung einer Verbindung der Formel (Ia) oder (Ib), wobei in jeder der Formeln (Ia) und (Ib), R1 H oder Methyl und R2 eine verzweigte oder unverzweigte C1- bis C5-Alkylgruppe ist, als Jasmin-Riechstoff.
Nano-sized nickel metal particles having narrow size-distribution were prepared through reduction of Ni(OH)2 with ethylene glycol under microwave irradiation. The average particle size was controlled between 5-8 nm by changing the irradiation time and irradiation power.
The first Et3N-mediated transesterification of β-keto esters using Baylis–Hillman alcohols
作者:Olfa Mhasni、Farhat Rezgui
DOI:10.1016/j.tet.2011.06.012
日期:2011.8
A simple and efficient Et3N-mediated transesterification between β-ketoesters and Baylis–Hillman alcohols in toluene solution at reflux using a Dean–Stark apparatus, is described. Allylic esters are exclusively obtained in moderate to good yields, with no trace amounts of γ,δ-unsaturated ketones usually expected from the Carroll decarboxylative rearrangement.