Enantioselective Carbometalation of Cinnamyl Derivatives: New Access to Chiral Disubstituted Cyclopropanes— Configurational Stability of Benzylic Organozinc Halides
作者:Stephanie Norsikian、Ilan Marek、Sophie Klein、Jean F. Poisson、Jean F. Normant
Enantioselective Carbolithiation of Cinnamyl Acetals. New Access to Chiral Disubstituted Cyclopropanes
作者:Stephanie Norsikian、Ilane Marek、Jean-François Poisson、Jean F. Normant
DOI:10.1021/jo9705172
日期:1997.7.1
Arylation of Aldehyde Homoenolates with Aryl Bromides
作者:Kevin Cheng、Patrick J. Walsh
DOI:10.1021/ol4008876
日期:2013.5.3
A mild palladium catalyzed coupling of reactive aldehyde homoenolates with aryl bromides is described. Aldehyde homoenolates are generated by ring opening of cyclopropanols via a C-C cleavage step. The coupling generates aldehyde products at room temperature in 59-93% yield.
Synthesis and olfactory evaluation of optically active β-alkyl substituted γ-lactones and whiskey lactone analogues
β-alkyl substituted γ-lactones and whiskey lactone analogues were synthesized, and the odor properties were evaluated. During the preparation of the chiral intermediates, we found good reaction conditions for the highly enantioselective esterification of 3-arylmethyl-2-methyl-1-propanols to kinetically resolve them. The results of the olfactoryevaluations of the synthesized lactones revealed that the alkyl
Diastereoselective “contra-Michael" addition of(−)-sparteineorganolithiumcomplexes to secondary chiral cinnamyl amides
作者:Nathalie Bremand、Ilan Marek、Jean F. Normant
DOI:10.1016/s0040-4039(99)00495-5
日期:1999.4
"Contra-Michael" addition of (-)sparteine/organolithium reagents complexes to cinnamyl secondary amides derived From (R) or (S)-alpha-Methylbenzylamine occurs with marched or mismatched pairs, and allows an enantioselective access to 2-benzyl-amides,- acids, or- alcohols. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.