作者:Joop Knol、Ben L Feringa*
DOI:10.1016/s0040-4039(97)00392-4
日期:1997.4
The enantiomerically pure endo-cycloadduct , obtained from the thermal Diels-Alder reaction of 5R-(l-menthyloxy)-2(5H)-furanone with cyclopentadiene is converted into (+)-tricyclo[5.2.1.0 and ]decadi-4,8-en-3-one ((+)-) in a one-pot procedure via ring-opening with lithium methyl dimethylphosphonate followed by an intramolecular Wittig-Horner-Emmons reaction in THF. The use of LiBr as additive in this
的对映体纯内切-cycloadduct ,从5的热第尔斯-阿尔德反应获得的[R - (升-menthyloxy)-2(5H) -呋喃酮与环戊二烯转化成(+) -三环[5.2.1.0和] decadi -4-一锅法中,通过二甲基膦酸锂甲酯的开环反应,制得1,8-en-3-one((+)- ),然后在THF中进行分子内Wittig-Horner-Emmons反应。在此步骤中使用溴化锂作为添加剂对形成镍极为有益。©1997由Elsevier Science Ltd发布。