A general route to α-alkyl (E)-α,β-unsaturated aldehydes
作者:Nour Lahmar、Jamaa Aatar、Taïcir Ben Ayed、Hassen Amri、Moncef Bellassoued
DOI:10.1016/j.jorganchem.2006.03.015
日期:2006.6
Bis(trimethylsilyl)-tert-butylaldimines 3 react with aldehydes in the presence of zinc bromide at room temperature to give, after hydrolysis, the desired α-alkyl α,β-ethylenic aldehydes in good yield and with very high Estereoselectivity. The reaction was believed to proceed via the α-silyl β-siloxyimines 4.
[EN] COMPOUNDS REDUCING MALODOUR PERCEPTION AND THE USE THEREOF<br/>[FR] COMPOSÉS RÉDUISANT LA PERCEPTION DES MAUVAISES ODEURS ET LEUR UTILISATION
申请人:CHEMCOM SA
公开号:WO2018138369A1
公开(公告)日:2018-08-02
The present invention relates to new malodour-counteracting agents of formula (I) or stereoisomers thereof, particularly useful in blocking the olfactory perception of androstenone, Formula (I), wherein R1, R2, R3,R4, R5, R6, R7 and X have the same meaning as that defined in the claims. The present invention also relates to consumer products comprising said agents. The present invention also relates to the use of said agents to suppress or attenuate undesirable odour, as well as to methods to suppress or attenuate undesirable odour employing said compounds.
Tetraalkylammonium and 1,3-Dialkylimidazolium Salts with Fluorinated Anions as Recoverable Phase-Transfer Catalysts in Solid Base-Promoted Cross-Aldol Condensations
作者:Galina V. Kryshtal、Galina M. Zhdankina、Sergei G. Zlotin
Compounds reducing malodour perception and the use thereof
申请人:CHEMCOM S.A.
公开号:US11382848B2
公开(公告)日:2022-07-12
The present invention relates to new malodour-counteracting agents of formula (I) or stereoisomers thereof, particularly useful in blocking the olfactory perception of androstenone, Formula (I), wherein R1, R2, R3, R4, R5, R6, R7 and X have the same meaning as that defined in the claims. The present invention also relates to consumer products comprising said agents. The present invention also relates to the use of said agents to suppress or attenuate undesirable odour, as well as to methods to suppress or attenuate undesirable odour employing said compounds.
本发明涉及式(I)或其立体异构体的新型恶臭抗衡剂,特别适用于阻断雄烯酮的嗅觉感知,式(I),其中 R1、R2、R3、R4、R5、R6、R7 和 X 与权利要求书中定义的含义相同。本发明还涉及包含上述制剂的消费品。本发明还涉及使用所述制剂抑制或减弱不良气味,以及使用所述化合物抑制或减弱不良气味的方法。
Phosphonates α-lithies agents de transfert fonctionnel. Preparation d'aldehydes α,β-insatures α-substitues