Preparation of optically active ketones via enantioface-differentiating protonation of prochiral enolates
作者:Kazutsugu Matsumoto、Hiromichi Ohta
DOI:10.1016/s0040-4039(00)92293-7
日期:1991.1
Enantioselectiveprotonation of the prochiral lithium enolate (2) of 2-benzylcyclohexanone (3) was developed. Reaction of 2 with methyl (S)-α-hydroxyisocaproate (15) as a chiral proton source afforded (R)-3 in a high optical yield. This reaction is widely applicable to the preparation of various α-substituted optically active ketones.
USE OF VOLATILE COMPOSITIONS TO LIMIT OR ELIMINATE PERCEPTION OF FECAL MALODOUR
申请人:Firmenich SA
公开号:EP3541435A1
公开(公告)日:2019-09-25
[EN] USE OF VOLATILE COMPOSITIONS TO LIMIT OR ELIMINATE PERCEPTION OF FECAL MALODOUR<br/>[FR] UTILISATION DE COMPOSITIONS VOLATILES POUR LIMITER OU ÉLIMINER LA PERCEPTION DES MAUVAISES ODEURS FÉCALES
申请人:FIRMENICH & CIE
公开号:WO2018091686A1
公开(公告)日:2018-05-24
The present disclosure relates to the field of malodour counteraction. More particularly, it concerns the use of volatile compositions to limit, decrease or eliminate the perception of fecal malodour. Such compositions include a malodour antagonist system associated with perfuming ingredients performing as malodour counteractant, in a combination that significantly reduces the perception of fecal malodour. Such compositions, their use in combination with delivery systems and their applications in consumer products are objects of the present disclosure.