Chelation-controlled facially selective cyclocondensation reactions of chiral alkoxy aldehydes: syntheses of a mouse androgen and of a carbon-linked disaccharide
Catalysis by lithium perchlorate in dichloromethane: Diels-Alder reactions and 1,3-Claisen rearrangements
作者:Manfred T. Reetz、Andreas Gansäuer
DOI:10.1016/s0040-4020(01)87187-8
日期:1993.7
Lithium perchlorate suspended in dichloromethane is an efficient catalyst (4 – 25 mol-%) for stereoselective Diels-Alder, hetero-Diels-Alder and regioselective 1,3-Claisen rearrangements; this process is milder, safer and environmentally less precarious than the use of 1 – 5 molar solution of LiClO4 in ether described previously in the literature.