制备 de l'enantiomere naturel de l'acide N-乙酰神经氨酸 a partir du phenylseleno-2 propanal et du benzyloxy-4 [furyl-2]-1 methoxy-1 trimethylsiloxy-3 butadiene-«1,3»。L'enantiomere du KDO est obtenu a partir du phenylseleno-2 propionate demethyle
Synthesis of optically active α-phenylselenyl carbonyl derivatives
作者:Andrew B. Holmes、Alan Nadin、Peter J. O'Hanlon、Neil D. Pearson
DOI:10.1016/s0957-4166(00)82087-x
日期:1992.10
Homochiral silyl enol ethers derived from N-acyl oxazolidinones can be phenyselenylated in high diastereoselectivity and good yield with phenylselenyl chloride. Removal of the chiral auxiliary is accompanied by some epimerisation. leading to isolation of the corresponding alpha-phenylselenyl methyl esters in moderate enantiomeric excess. A slightly improved enantiomeric excess is achieved if 4(S)-benzyl-2-oxazolidinethione 17 is used as a chiral auxiliary.