5033-95-4Relevant articles and documents
Conjugate addition of aryl nucleophiles to α,β-unsaturated cinnamic acid derivatives containing Evans type chiral auxiliaries
Leitis, Zigmārs,Lūsis, Viesturs
, p. 843 - 851 (2016/09/02)
Cinnamides containing oxazolidin-2-one type auxiliaries have been prepared. A novel pathway to chiral 4-aryl-6-methyl-3,4-dihydrocoumrines via the asymmetric conjugate addition of arylmagnesium bromides to these cinnamides is described.
Modified Yamaguchi reagent: Convenient and efficient esterification
Okuno, Yoshinori,Isomura, Shigeki,Nishibayashi, Akihiro,Hosoi, Aiko,Fukuyama, Kei,Ohba, Masashi,Takeda, Kazuyoshi
supporting information, p. 2854 - 2860 (2014/10/15)
A convenient and efficient esterification method that used a modified Yamaguchi reagent (2,4,6-trichlorobenzoyl chloride-4-dimethylaminopyridine) and avoided use not only of intractable acid chloride but also of acid anhydrides was proposed. The reaction mechanism was described by Fourier transform infrared spectroscopy and supported by a density functional theory calculation.
Highly diastereoselective synthesis of vinylcyclopropane derivatives with (-)-8-phenylmenthol as chiral auxiliary
Ye,Tang,Dai
, p. 5717 - 5722 (2007/10/03)
The silylated telluronium allylide 4, generated in situ from the corresponding telluronium salt in the presence of LiTMP, reacted with (-)-8-phenylmenthyl α,β-unsaturated esters to afford trans-2-silylvinyl-trans-3-substituted cyclopropyl esters with high diastereoselectivity in high yields. The absolute configuration was determined by chemical transformation. A mechanistic rationale is proposed.