Diastereo- and enantioselective synthesis of 1,2-diols by vanadium (II) promoted pinacol cross coupling.
作者:Rita Annunziata、Mauro Cinquini、Franco Cozzi、Paola Glaroni、Maurizio Benaglia
DOI:10.1016/s0040-4020(01)86526-1
日期:1991.7
promoted pinacol cross coupling of a chiral aromatic aldehyde with chiral aliphatic aldehydes occurs to afford diols in up to 91:9 diastereoisomeric ratio and up to 84% enantiomeric excess. The pinacol coupling of (S)-lactaldehyde and (R)-glyceraldehyde derivatives has also been studied and matching and mis-matching pairs have been identified. The stereochemistry of the products was established by correlation
发生V(II)促进的手性芳族醛与手性脂族醛的频哪醇交联,以提供高达91:9的非对映异构体比例和高达84%的对映体过量的二醇。还已经研究了(S)-丙醛和(R)-甘油醛衍生物的频哪醇偶联,并且已经鉴定出匹配和错配对。通过相关性建立产物的立体化学。讨论了立体选择的意义和程度。