1,4-asymmetric induction in the Nozaki-Hiyama reaction
作者:Robert J Maguire、Johann Mulzer、Jan W Bats
DOI:10.1016/0040-4039(96)01161-6
日期:1996.7
A series of allyl bromides 3a-c bearing a stereogenic carbon substituent at C-2 are synthesised in four steps from methyl acrylate. These are found to react with aldehydes, mediated by chromium(II) chloride, to furnish syn-4-alkoxyalkan-1-ols 4 in good to excellent diastereoselectivity.
1,4-Asymmetric Induction in the Chromium(II)- and Indium-Mediated Coupling of Allyl Bromides to Aldehydes
作者:Robert J. Maguire、Johann Mulzer、Jan W. Bats
DOI:10.1021/jo960986o
日期:1996.1.1
conditions to afford syn-4-alkoxyalkan-1-ols in good yield and diastereoselectivity. The effect of altering the nature of the ethereal group and alkyl substituent upon the diastereoselectivity of the reaction was also investigated. The relative stereochemistry was proved by X-ray structure analysis. The work was extended to replace the chromium(II) chloride with indium metal, and this also afforded sy