Two effective procedures for the synthesis of trichloromethyl ketones, useful precursors of chiral α-amino and α-hydroxy acids
作者:E.J. Corey、John O. Link、Yang Shao
DOI:10.1016/s0040-4039(00)92656-x
日期:1992.6
Trichloroacetic acid can been converted to trichloromethyl ketones in good yield by two practical new procedures, one involving the catalyzed reaction of trichloroacetic acid with aldehydes at 23 °C followed by oxidation and the other utilizing the coupling of organozinc intermediates with trichloroacetyl chloride
Bromoform Activation. TiCl<sub>4</sub>–Mg-Promoted CHBr<sub>2</sub><sup>–</sup> and CBr<sub>3</sub><sup>–</sup> Transfer to a Variety of Aldehydes and Ketones
作者:Tu-Hsin Yan、Su-Haur Chang、Cheng-Ta Chang、Chia-Kuan Lin、Chien-Yu Liu
DOI:10.1021/ol402861a
日期:2013.11.15
TiCl4-Mg can mediate addition of CHBr3 to a variety of aldehydes and ketones to form dibromomethyl carbinols and also be used to effect CBr3 transfer to carbonyl groups to form tribromomethyl carbinols. The successful application of TiCl4-Mg-promoted coupling of CHBr3 with various carbonyl compounds, especially in the case of highly enolizable ketones such as 2-indanone and beta-tetralone, highlights the extraordinary reactivity and selectivity and the weakly basic nature of this system.